Watch List notes:

COMMEMORATIVE MEDALS, WORLD MEDALS, Italy, Leonardo Ximenes (1716-1786), mathematician and astronomer, cast Bronze Medal, 1785, by Lorenzo Maria Weber (1697-1765), bust left in academic gown, LEON XIMENIVS M ET D MATHS, rev seated figure of Minerva with infants, DE ASTR AC HYDR / TB M, 80.5mm (V&T 430; Brett 1337; Knyp II, 626). Very fine, pierced at top, some tooling but leaving a pleasant patinated surface.
ex Michael Hall collection
Ximenes was also a civil and hydraulic engineer and geographer. The astronomical observatory, Osservatorio Ximeniano, in Florence, is named after him. He worked on the Pistoia Road linking Tuscany and Modena and designed the bridges over the Sestajone and Lima rivers.

Estimate: £150-200