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Student Artwork Guide

Device for Making Sequins

Name Class Date

Leonardo da Vinci, Device for Making Sequins (1480), Biblioteca Ambrosiana. Public domain. See this canvas under a moving light: the drawing, the true colour under the varnish, the bare pigment

The facts

Artist
Leonardo da Vinci artsdot.com/en/artists/leonardo-da-vinci/
Artist’s dates
1452 – 1519
Painted
1480
Movement
Renaissance The brief peak when balance, depth and anatomy came together — Leonardo, Raphael, Michelangelo.
Period
Renaissance
Held at
Biblioteca Ambrosiana artsdot.com/en/museums/biblioteca-ambrosiana-milan/
Artistic style
Realistic
Influences
Andrea del Verrocchio
Notable elements or techniques
Complex gears & cogs; Sfumato
Subject or theme
Engineering; Mechanical device

In context

Device for Making Sequins — Leonardo da Vinci

When was this painted?

  1. 1450
  2. 1460
  3. 1470
  4. 1480
  5. 1490
  6. 1500
  7. 1510

Row above: the years. Row below: how old the artist was at the start and at the end of each span — 0 at birth, 67 at death.

Painted when the artist was 28. The artist lived to 67. 48 of the 395 dated works by this artist in our catalogue came earlier.

Shaded: the lifetime of Leonardo da Vinci (1452–1519) ▲ this work, 1480 every dated painting, decade by decade

First works: up to 1487 Main working years: 1487–1506 Late works: from 1506

Those three bands split the works this catalogue has a date for into a first quarter, a middle half and a last quarter. They are not the artist’s complete output: a thin stretch may be a gap in the record rather than a quiet spell. The same years with the artist’s life laid along them

Compare with

Pick one work above: name two things it shares with this one, and one thing that's different.

More works to set beside this one: artsdot.com/en/art/similar/leonardo-da-vinci-device-for-making-sequins-8XZP9U-en/

Colours

Measured from the image

    Main colour

    Rosy Brown #c0b38f

    Catalogued palette

    • #C0B38F
    • #4F4331
    • #95886B
    • #E3D6AA

    These colours inside the artist’s whole palette Find other paintings by colour

    Palette
    Neutrals The dominant colour family in the image.
    Main colour name
    Rosy Brown
    Intensity
    Vivid How saturated and varied the colours are, from a single toned-down hue to many bright ones.
    Contrast
    Gentle How much the colours differ in lightness and saturation across the picture.
    Harmony
    Unified Palette How well the colours work together, from clashing to fully unified.
    Brightness
    Brilliant How light or dark the picture reads overall, from deep shadow to bright highlight.
    Saturation
    Balanced Soft How pure and strong the colours are, from near-grey to fully vivid.

    Where in the world is this painting looked at?

    • under 1%
    • 1–3%
    • 3–8%
    • 8–20%
    • 20% and over
    This painting alone has too few recorded visitors to map, so the plate reads every work by Leonardo da Vinci over the last twelve months — 113 countries in all. Where these figures come from

    The ten leading countries

    1. 1 Italy 23.6%238,800 visits
    2. 2 France 21.0%212,200 visits
    3. 3 China 11.3%114,200 visits
    4. 4 Spain 10.8%109,000 visits
    5. 5 United States of America 4.3%43,800 visits
    6. 6 Germany 2.3%23,700 visits
    7. 7 Japan 2.3%22,900 visits
    8. 8 Hong Kong 2.0%20,000 visits
    9. 9 Singapore 1.9%19,700 visits
    10. 10 Brazil 1.7%16,900 visits
    11. · 103 other countries 18.8%190,300 visits

    Find the three darkest countries on the map. Is the museum that keeps this painting in any of them? Write down one reason people far away might look at it.

    The 20 most looked-at works by Leonardo da Vinci

    1. 1 Mona Lisa (La Gioconda), 1519 42.5%543,200 visits
    2. 2 Vitruvian Man 7.3%93,800 visits
    3. 3 The Last Supper, 1495 4.3%55,000 visits
    4. 4 Lady with an ermine, Czart, 1490 2.3%29,600 visits
    5. 5 The Baptism of Christ, 1475 1.9%24,100 visits
    6. 6 The Last Supper, 1495 1.8%22,600 visits
    7. 7 Lady with an Ermine, 1490 1.7%21,300 visits
    8. 8 Annunciation, 1472 1.6%20,600 visits
    9. 9 The Virgin and Child with Saint Anne, 1513 1.3%16,500 visits
    10. 10 The Virgin and Child with Saint Anne, 1510 1.2%15,500 visits
    11. 11 The Last Supper, 1497 1.1%13,700 visits
    12. 12 Salvator Mundi, 1500 1.0%12,400 visits
    13. 13 Saint John the Baptist, 1515 0.7%8,800 visits
    14. 14 Virgin of the Rocks - London, 1486 0.6%7,600 visits
    15. 15 Baptism of Christ, 1475 0.5%6,200 visits
    16. 16 Portrait of an Unknown Woman (La Belle Ferroniere), 1490 0.5%6,000 visits
    17. 17 La belle Ferronière, 1490 0.5%5,900 visits
    18. 18 Portrait of Ginevra de' Benci, 1474 0.5%5,800 visits
    19. 19 The Annunciation. Detail, 1475 0.4%5,600 visits
    20. 407 Device for Making Sequins, 1480 this painting 0.0%200 visits

    Together these works take 71.7% of all the attention this artist's paintings received over the last twelve months. The catalogue holds 548 works by this artist, of which 482 were looked at at least once. This painting ranks 407 of them, with 0.0% of that attention (200 visits). The same counts, month by month

    Bars measure attention, not quality. Pick the work at the top and this one: name one thing that might make a painting famous beyond how well it is painted.

    About this artwork

    Device for Making Sequins — Leonardo da Vinci

    Leonardo da Vinci: Device for Making Sequins

    Leonardo da Vinci’s “Device for Making Sequins,” housed at the Biblioteca Ambrosiana in Milan, Italy, stands as a testament to his unparalleled ability to synthesize art and engineering—a hallmark of the Renaissance spirit. This intricate drawing, dated approximately 1480, transcends mere mechanical illustration; it embodies Da Vinci's profound understanding of physics and his visionary imagination for transforming practical problems into aesthetically pleasing creations.

    The Drawing’s Detail: The sketch captures a complex apparatus designed to produce gilded sequins—decorative embellishments used extensively in women’s clothing during the fifteenth century. It depicts a substantial metal framework, dominated by a large gear and several smaller cogs meticulously positioned to drive the sequin-making process.

    Da Vinci's Engineering Genius: The drawing isn’t simply about gears; it showcases Da Vinci’s grasp of concepts like leverage and rotational motion—principles fundamental to his broader explorations in mechanics and weaponry. He demonstrates a remarkable awareness of how forces could be harnessed to achieve specific tasks.

    Historical Context: Produced during Da Vinci's formative years in Milan under Ludovico Sforza, the device reflects the Duke’s patronage of scientific inquiry and artistic innovation. It aligns with the broader Renaissance fascination with observation and experimentation—a departure from medieval scholasticism.

    Symbolic Significance: Beyond its functional purpose, the drawing speaks to Da Vinci's desire to elevate craftsmanship into an art form. The meticulous rendering of each component underscores his belief that beauty could be found even in utilitarian objects.

    Emotional Impact: Viewing this drawing evokes admiration for Da Vinci’s intellectual curiosity and creative brilliance—a reminder that true genius lies not only in artistic skill but also in the ability to conceive of groundbreaking inventions.

    The Drawing

    The meticulous detail evident in “Device for Making Sequins” reveals Da Vinci's dedication to capturing precise representations of reality. Each gear, cog, and supporting strut is rendered with painstaking accuracy—a characteristic feature of his artistic style that distinguishes it from earlier conventions. The drawing’s perspective—carefully constructed to convey depth and spatial relationships—further enhances its visual impact.

    Leonardo Di Ser Piero Da Vinci & Andrea Del Verrocchio

    Leonardo Di Ser Piero Da Vinci & Andrea Del Verrocchio is a name synonymous with excellence in art and science. His works continue to captivate audiences worldwide, inspiring new generations of artists, engineers, and inventors.

    For more information on Leonardo Da Vinci's life and works, visit Leonardo Di Ser Piero Da Vinci & Andrea Del Verrocchio at AllPaintingsStore.

    Reusing this file

    The Device for Making Sequins by LEONARDO da Vinci is a remarkable example of Renaissance ingenuity. It showcases not only the artistic skill but also the inventive genius of one of history’s most celebrated figures. For art enthusiasts and historians, this piece offers a unique glimpse into the mind of a true polymath.

    Leonardo Da Vinci: Device for Making Sequins

    Leonardo Da Vinci: Drawings of Water Lifting Devices

    Leonardo Da Vinci: Skis with which one can walk on water (detail)

    Leonardo Di Ser Piero Da Vinci & Andrea Del Verrocchio is a name synonymous with excellence in art and science. His legacy continues to inspire creativity and innovation today.

    Artist and museum

    Artist

    Leonardo da Vinci

    Born in Anchiano, Italy

    The Early Life and Training of Leonardo da Vinci

    Leonardo da Vinci was born on 15 April 1452 near the Tuscan hill town of Vinci. His origins were defined by a specific social reality: he was the illegitimate son of a successful notary, Piero Fruosino di Antonio da Vinci, and a lower-class woman named Caterina Cambi. This background placed him within the social structures of the Tuscan countryside from the start. He eventually moved to Florence, where his education took place. The city provided an atmosphere centered on the precision of disegno, a rigorous focus on drawing that would dictate his technical approach for the rest of his life.

    At the age of fourteen, Leonardo da Vinci entered the workshop of Andrea del Verrocchio. This apprenticeship was the foundation of his technical capability. In Verrocchio's studio, the boundaries between different crafts were thin, and he learned to handle the tools of both a painter and a sculptor. This training was not merely about the brush; it involved understanding the mechanics of sculpture and the physical properties of various materials. He developed a way of seeing that connected the movement of a muscle to the way light falls across a surface, a skill rooted in the discipline of his early years.

    Artistic Activity in Florence and Milan

    Leonardo’s career was defined by a constant movement between the major centers of the High Renaissance. He was principally active in Florence from 1472 until about 1482, and again during the period between 1500 and 1508. These Florentine years provided the essential foundation for his development, but his long-term trajectory was heavily shaped by his time in Milan. He spent much of his life serving Ludovico Sforza in Milan, a tenure that lasted from approximately 1482 to 1499. This period of service was not a single continuous stretch, as he returned to Milan between 1508 and 1513.

    While Florence and Milan were his primary operational hubs, his reach extended beyond these two cities. His professional life included significant work in Rome and eventually in France. This geographic mobility prevented his style from becoming static. Instead of remaining tethered to one court, he navigated the shifting political landscapes of the Italian peninsula. His presence in Milan was marked by a continuous dialogue with the court, where his interests in engineering and science often intersected with his artistic commissions. This intersection of disciplines ensured that his output was never limited to mere decoration.

    1475: The Baptism of Christ

    1495: The Last Supper

    Patrons and Major Commissions in Milan

    Leonardo's presence in Milan was defined by his long-term service to Ludovico Sforza. This relationship dictated the scale and nature of his output, forcing a constant negotiation between the religious requirements of the era and the specific political needs of the Sforza court. His work during this period was not a series of isolated tasks but a continuous response to the ambitions of his patrons. He moved between diverse subjects, balancing the demands of a ruling dynasty with his own technical experimentation.

    The most significant consequence of this patronage was the decoration of the wall of the mausoleum in the refectory of the Convent of Santa Maria delle Grazie. This commission resulted in The Last Supper. The project required a departure from traditional fresco methods, as Leonardo utilized an oil-based paint mixed with mastic to allow for the slow layering and frequent revisions his process demanded. This choice, while allowing for greater detail, created a physical vulnerability in the work that has required centuries of restoration. The mural remains a central part of the Milanese landscape, capturing a specific moment of human tension through a rigorous application of perspective.

    The Last Supper (c. 1495–1498)

    Key Masterpieces and Famous Works

    The Mona Lisa remains the most famous painting in existence. Located in the Musée du Louvre, Paris, it commands a level of global attention that few other works can claim. Similarly, the Vitruvian Man drawing has become a cultural icon by mapping the proportions of the human form. These works demonstrate a capacity to translate complex observation into a visual language that persists in the modern consciousness.

    Religious art reached a peak of reproduction with The Last Supper. This mural, located in the refectory of the Convent of Santa Maria delle Grazie in Milan, depicts the moment after Jesus announces a betrayal. Its use of perspective to pull the viewer into the room remains a standard for psychological drama. The market for his surviving canvases is equally intense. In 2017, the Salvator Mundi was sold at auction for US$450.3 million, a figure that reflects the immense value placed on his hand.

    The Baptism of Christ (1475)

    Lady with an Ermine (1490)

    The Virgin and Child with Saint Anne (1510)

    Saint John the Baptist (1515)

    Technique and Artistic Style

    Leonardo’s approach to the canvas was driven by a relentless need to reconcile scientific observation with visual representation. He did not merely paint figures; he reconstructed them through a rigorous investigation of human anatomy. By studying cadavers, he gained a precise understanding of how muscle and bone function, allowing him to render the human form with a level of accuracy that fundamentally altered the standards of anatomical illustration. This was not a matter of mere likeness, but a structural necessity that informed every stroke.

    His technical innovations centered on the manipulation of light and atmosphere. He developed sfumato, a method of using subtle gradations of tone to blur the edges of his subjects. This technique removed the harshness of outlines, allowing forms to emerge from a smoky haze. He paired this with chiaroscuro to control the interplay of light and shadow, creating a sense of three-dimensional volume. To achieve these effects, he experimented with unconventional materials, including an oil-based paint mixed with mastic, a resin intended to allow for slow drying and continuous layering.

    The Baptism of Christ, 1475

    The Last Supper, ca. 1495–1498

    Mona Lisa, ca. 1503–6

    The Final Years and Death in France

    Leonardo da Vinci’s later years were defined by a shift in geography that mirrored his restless intellectual movement. After working in Rome from 1513 to 1516, he moved toward the end of his life under the invitation of Francis I. This transition took him to France, where he spent his final three years living and working. His presence in the French court marked the conclusion of a career that had already spanned the major centers of the High Renaissance.

    The end of his life was spent in France, where he continued his investigations until his death on 2 May 1519. His final years were not a period of quiet retirement but a continuation of the intense observation that characterized his entire existence. He died in France, leaving behind a body of work that remains a primary reference for the intersection of scientific inquiry and visual representation.

    The Enduring Legacy of a Polymath

    Leonardo da Vinci remains a central figure in Western art history, a status supported by a body of work that shaped European artistic development to a degree rivaled only by Michelangelo. His influence stems from a refusal to separate the act of painting from the act of investigation. He functioned simultaneously as a painter, draughtsman, engineer, scientist, theorist, sculptor, and architect. This breadth of interest ensured that his contributions were never confined to a single medium or discipline.

    His notebooks provide the most direct evidence of this restless intellect. They reveal a mind that never stopped observing the mechanics of the world, documenting everything from the flow of water to the structural intricacies of human bone. This empirical approach meant that his drawings were not merely preparatory sketches but tools for recording a continuous investigation of nature. He treated the physical world as a subject to be decoded through rigorous observation.

    The scale of his impact is visible in the way his diverse interests intersected. His scientific inquiries into anatomy and light informed his visual output, creating a feedback loop between theory and practice. This integration of disciplines allowed him to move beyond simple representation toward a profound understanding of how the world functions. His legacy is defined by this refusal to specialize, opting instead to master the mechanics of existence through a wide range of technical and scientific pursuits.

    Where to See His Works Today

    To witness the physical reality of his output, one must travel to specific institutional collections. The Mona Lisa remains in the Musée du Louvre in Paris. It is a central fixture of that museum's collection. In Krakow, the Czartoryski Museum holds the Lady with an Ermine. These locations represent the primary sites for viewing his most significant surviving canvases.

    Florence remains a critical destination for those tracking his early development and technical shifts. The Galleria degli Uffizi contains both the Annunciation and the Baptism of Christ. These works allow for a direct comparison of his evolving command over light and landscape. Seeing them in situ provides a sense of the scale and the specific environments for which they were intended.

    Salvator Mundi, attributed in whole or part

    The Last Supper, Milan

    Vitruvian Man, undated

    Museum

    Biblioteca Ambrosiana

    On show in Milan, Italy

    Origins and History of Biblioteca Ambrosiana

    Established in 1609 by Cardinal Federico Borromeo, the Biblioteca Ambrosiana emerged from a desire to preserve knowledge and foster intellectual life. It was conceived as a bulwark of Catholic scholarship during the Counter-Reformation, intended to provide a sanctuary for study and research. Named after Ambrose, the patron saint of Milan, the institution was designed to be a haven for learning within the city. Today, the complex is recognized by several names, including the Pinacoteca Ambrosiana and the Veneranda Biblioteca Ambrosiana.

    The foundation of the institution was rooted in a specific vision of scholarship. Borromeo sought to create a space where the pursuit of knowledge and the contemplation of beauty could exist in harmony. This purpose drove the acquisition of vast collections, including Greek manuscripts and significant libraries from across Europe. The institution has evolved from its original purpose into a significant cultural center that maintains a continuous link to the Renaissance and the Early Modern period.

    The history of the site is tied to the religious and intellectual shifts of the seventeenth century. By opening its doors to scholars, the library became part of a small group of institutions in Europe to grant regular access to the learned. This commitment to accessibility has allowed the collection to endure through centuries of changing academic and religious landscapes.

    The Architecture of the Renaissance Building

    The structure presents a profound example of Renaissance architecture, defined by a sense of balance and scholarly restraint. Its façade follows a strict symmetrical design, anchored by a central loggia. This space is supported by Corinthian columns, which provide a rhythmic verticality to the exterior. Within the building, the grand hall features impressive marble flooring and intricate stucco work that catches the light. High, coved ceilings rise above the rooms, adorned with frescoes that command the gaze upward.

    A courtyard exists within the complex, offering a tranquil oasis away from the movement of Milan. This space provides a quiet respite, maintaining the original purpose of the site as a haven for contemplation. The interior layout, while shaped by its ancient bones, creates a curated path through the various levels. Light enters through two enormous semicircular windows located at each end of the grand hall, illuminating the vast reading rooms and the scholarly spaces designed for research.

    The Pinacoteca Ambrosiana Art Collection

    The Pinacoteca Ambrosiana functions as the art gallery of the complex, housing an extraordinary collection of paintings, drawings, and prints. These works span from the 14th to the 18th centuries, tracing a long evolution of visual language. The collection encompasses the stylistic shifts of the Renaissance, Mannerism, and the Baroque. Each piece exists as a physical presence, offering a direct encounter with the history of European art.

    The gallery contains works by masters such as Botticelli and Raphael. These paintings and drawings represent specific moments in the development of classical and post-classical aesthetics. The breadth of the collection allows for a quiet observation of how light and form were handled across several centuries. The presence of these works within the library's walls connects the act of scholarly study with the visual reality of the art itself.

    Basket of Fruit, about 1596 - Caravaggio

    Knight on Horseback, 1512 - Albrecht Dürer

    St Jerome in His Study, 1511 - Albrecht Dürer

    The infant Jesus with a Lamb, 1525 - Bernardino Luini

    Masterpieces of the Ambrosiana Collection

    The presence of Leonardo da Vinci within these walls is felt through both his scientific inquiry and his artistic hand. The Codex Atlanticus remains a monumental collection of his drawings and writings, offering a direct encounter with his intellect. Alongside these notebooks, the library holds the rare Multi Barrel Gun, a precise study of mechanical design. Perhaps most significant is the only known copy of his St. John the Baptist, a work that commands attention through its singular existence.

    The collection also holds works that define the transition of styles across centuries. Bernardino Luini’s The infant Jesus with a Lamb, dated about 1525, provides a moment of quietude. In contrast, the ceiling frescoes by Domenico Piola embody the Baroque style, utilizing dramatic lighting and theatrical composition to fill the space with movement. These works exist alongside a variety of other significant pieces:

    Basket of Fruit, 1596 - Caravaggio

    Knight on Horseback, 1512 - Albrecht Dürer

    St Jerome in His Study, 1511 - Albrecht Dürer

    Amorous Peasants - Albrecht Dürer

    Major Acquisitions and Historical Collections

    The depth of the collection is rooted in significant acquisitions that expanded the library's reach across Europe. In 1606, the institution acquired the manuscripts of the Benedictine monastery of Bobbio. This addition brought ancient texts into the Milanese collection, adding to the weight of the library's scholarly holdings. The acquisition of the library of Vincenzo Pinelli from Padua further strengthened these ranks. This specific collection arrived in seventy cases and contained more than 800 manuscripts, contributing to the vastness of the library's archival presence.

    The presence of Greek thought is felt through the inclusion of more than a thousand Greek manuscripts. These volumes represent a significant portion of the library's intellectual weight. Among the most delicate items is a sixth-century papyrus of Josephus, which was acquired from Sant'Ambrogio in Milan. Such fragments offer a direct connection to the early centuries of written history.

    Sixth-century papyrus of Josephus

    Vincenzo Pinelli library manuscripts

    Bobbio monastery manuscripts

    Where to read more

    Find this online

    QR code linking to the download page for Device for Making Sequins

    artsdot.com/en/art/download/leonardo-da-vinci-device-for-making-sequins-8XZP9U-en/

    Cite this artwork

    MLA
    Vinci, Leonardo da. Device for Making Sequins. 1480, Biblioteca Ambrosiana. https://artsdot.com/en/art/leonardo-da-vinci-device-for-making-sequins-8XZP9U-en/
    APA
    Vinci, Leonardo da (1480). Device for Making Sequins [Painting]. Biblioteca Ambrosiana. https://artsdot.com/en/art/leonardo-da-vinci-device-for-making-sequins-8XZP9U-en/
    Chicago
    Leonardo da Vinci. Device for Making Sequins. 1480. Biblioteca Ambrosiana. https://artsdot.com/en/art/leonardo-da-vinci-device-for-making-sequins-8XZP9U-en/
    Harvard
    Vinci, Leonardo da (1480) Device for Making Sequins. Biblioteca Ambrosiana. Available at: https://artsdot.com/en/art/leonardo-da-vinci-device-for-making-sequins-8XZP9U-en/

    Look closely

    Device for Making Sequins — Leonardo da Vinci

    Look closely

    Answer in your own words. There are no wrong answers here — only answers you can explain.

    1. What catches your eye first, and why?
    2. Which colours or shapes create the mood — and what is that mood?
    3. Our catalogue files this work under: renaissance art, leonardo da vinci, engineering. Do you agree? What would you add, or take away?
    4. Look back at Mona Lisa (La Gioconda) (1519), earlier in this guide. Name two things it shares with this work, and one that is different.
    5. Renaissance: The brief peak when balance, depth and anatomy came together — Leonardo, Raphael, Michelangelo. Where can you see that in this work?

    Your response

    Write a short paragraph about this artwork. Use the facts from the earlier parts of this guide, and your answers above.

    Art quiz

    Device for Making Sequins — Leonardo da Vinci

    How well do you know this artwork?

    Tick one answer for each of the 5 questions below. Each has exactly one correct answer.

    1. 1. What is the primary subject matter depicted in Leonardo da Vinci’s ‘Device for Making Sequins’?

      • A A Detailed portrait of Ludovico Sforza.
      • B A complex mechanical design intended to produce gold sequins.
      • C An architectural plan for the Fondaco dei Turchi.
    2. 2. In what city is Leonardo da Vinci’s ‘Device for Making Sequins’ housed?

      • A Florence
      • B Rome
      • C Milan
    3. 3. Leonardo Da Vinci's 'Device for Making Sequins' exemplifies his mastery of which artistic principle?

      • A Linear perspective.
      • B Impasto technique.
      • C Sfumato.
    4. 4. What was Leonardo da Vinci commissioned to do when he created ‘The Last Supper’?

      • A Sculpt a monumental statue of Saint Peter.
      • B Paint a fresco depicting the Holy Communion.
      • C Design an elaborate stage set for a theatrical performance.
    5. 5. Leonardo Da Vinci's 'Drawings of Water Lifting Devices' demonstrate his interest in which field?

      • A Literature
      • B Music
      • C Engineering

    My score: ____ out of 5

    Answer key — for the teacher

    This starts a fresh printed page, so it can simply be left out of the copies.

    1A · 2C · 3C · 4B · 5C

    Check any answer against the catalogue record for this painting

    Questions & Answers

    Is "Device for Making Sequins" a famous Renaissance artwork?

    Within the Renaissance movement, "Device for Making Sequins" has an iconic popularity level.

    At what size is "Device for Making Sequins" recommended to be printed?

    The recommended print size for "Device for Making Sequins" by Leonardo da Vinci is large.

    Which period of Leonardo da Vinci's career does "Device for Making Sequins" belong to?

    "Device for Making Sequins" belongs to the Mature Period of Leonardo da Vinci's career. This classification relates the work to the artist's development.