'The Sforza Monument', c1488-1493. Artist: Leonardo da Vinci
'The Sforza Monument', c1488-1493. Top: study, c1488-1490, from the collection of the Royal Library, Windsor Castle, Windsor, England; bottom right: 'Two Sketches of Moulds for Casting a Prancing Horse', from the Codex Atlanticus, centre: 'Horse within a Mould', bottom left: 'The Mould Packed for Transport', 1491-1493, from the collection of the Royal Library, Windsor Castle, Windsor, England.
Artist: Leonardo da Vinci