1467–1481 - Florence I—The Rising Star and the Law

Where was Leonardo in 1476? He was in Florence, appearing before the "Tamburo," a wooden box used for anonymous denunciations of vice. The "Rising Star vs. The Law" snapshot tracks his transition from a teenage apprentice in Verrocchio’s shop to an independent master whose social life and professional output were suddenly jeopardized by legal scrutiny.

Daily Life in the Workshop (1467–1481) Leonardo's entry into the workshop of Andrea del Verrocchio in the late 1460s placed him at the center of the Florentine artistic explosion. By 1472, he was a registered master in the Guild of St. Luke, yet he chose to remain in Verrocchio’s studio for several more years.

The household accounts of this era are sparse, but the legal records are voluminous. The most significant event was the anonymous denunciation for sodomy on April 9, 1476, involving a 17-year-old male prostitute, Jacopo Saltarelli. Leonardo was accused alongside three others, including a member of the aristocratic Tornabuoni family.

The Armenian Hypothesis (1476–1478) There is a documented gap in Leonardo's Florentine presence between his second acquittal for sodomy in June 1476 and his re-emergence with the 1478 commission for the Chapel of San Bernardo. Scholarly theories regarding these "missing years" often focus on the "Armenian Letters" found in the Codex Atlanticus.

In these drafts, Leonardo speaks of his time as an engineer for the Defterdar of Syria, describing the Taurus Mountains and his observations of the "Alpine-glow" on their peaks.

While many historians dismiss this as a fictional romance, the investigative genealogist notes that the editing and erasures in Leonardo's hand suggest a technical report rather than a literary exercise. If he did indeed travel to the East, it provides a plausible origin for his advanced understanding of military engineering and cartography.

Early Tools and Techniques Year Innovation / Tool Technical Note Evidence Grade1473 Landscape as Standalone Subject The Arno Valley drawing (Aug 5, 1473) uses a bird's-eye perspective.[Certified]1475 Introduction of Oil Medium Use of oils in Verrocchio’s "Baptism of Christ" to achieve sfumato in the angel's face.[Inferred]1478 Atmospheric Perspective Development of "aerial perspective," where distant objects lose color intensity.[Inferred]

The Florentine Ascension Geo-Location: Florence. Residence: Initially with Ser Piero at the Palagio del Podestà, then later at the workshop of Verrocchio near the Duomo. The Workbench: Started: "The Annunciation" (c. 1472), "Ginevra de' Benci" (c. 1474). Stalled: The Adoration of the Magi (1481), left unfinished upon his departure for Milan.

Scientific Breakthroughs: 1473: Earliest recorded study of hydraulics in the Arno River. 1478: Development of early mechanical designs, including a self-propelled cart and automated looms found in early folios of the Codex Atlanticus. World Context (Collision Point): 1478: The Pazzi Conspiracy.

The attempted assassination of Lorenzo de' Medici in the Duomo creates a climate of paranoia and shifts the focus of Florentine patronage toward military and political consolidation.