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Baldassarre Lanci, Strumento prospettico-topografico
Baldassarre Lanci, Perspective and surveying instrument

1557
Gilt brass; diameter 30 cm, height on tripod 139 cm
Florence, Istituto e Museo di Storia della Scienza, inv. 152, 3165

Built by the military engineer Baldassarre Lanci for the Duke Cosimo de’ Medici, this instrument was used for surveying by means of triangulation and perspective.