Evidence Performed by Leonardo da Vinci

  • Name
    Fortifications for Piombino and the Imola city plan
  • Description

    A high-stakes, discrete military engineering project executed for Cesare Borgia during his aggressive campaign in the Romagna region. To optimize regional defense and artillery placement, Leonardo bypassed traditional abstract pictorial maps, implementing a rigorous topographic land survey of Imola.

    Using a magnetic compass and an azimuthal sighting dial, he mapped every street intersection and fortification angle, translating the data into a perfectly scaled ichnographic (flat, top-down) map. This strategic project provided absolute geometric precision for troop deployments and established the structural baseline for modern military cartography.

  • Start Date
    1502-09-01
  • Duration
    3 months
  • Type
    Professional
  • For
    Cesare Borgia, Duke of Valentinois
  • Title
    General Engineer and Architect
  • Primary Responsibilities
    Conducting field measurements of city walls and street coordinates using specialized surveying dials. Translating physical angles and distances into a mathematically scaled, top-down map plan. Auditing existing city fortifications to pinpoint structural vulnerabilities against cannon fire. Presenting actionable tactical layouts and engineering solutions to senior military leadership.

Used Skills