IV.5C.a1 Clay model for casting the horse for the Sforza monument Reconstruction in scale of 1:7 after Leonardo da Vinci, Madrid Ms. II and Royal Collection, Windsor, 12321r; P 92r Opera Laboratori Fiorentini The original model was destroyed by Gascon archers during the French occupation of Milan in 1499.
[IV.5CThe Molding Process]
Leonardo’s desire to make the gigantic monument in a single casting led him to develop a molding method that would produce a casting of uniform thickness and lighter weight.