Leonardo da Vinci photo gallery
Madrid Ms. II, 3r. - Measurements made between Montalbano, the Monti Pisani and Volterra and mention of "Francesco da Siena", c. 1503. In the long list of books "In cases at the monastery", he mentions also a "Book on abacus, Giovan del Sodo has it" and a "Cornazano de re militari, Gug[li]lelmo de' Pazi has it".
Alessandro Vezzosi
Last update 14/mar/2008