In the Milanese years, for Ludovico il Moro, Leonardo designed military machines, irrigation systems, sets for parties and in particular for the wedding of Gian Galeazzo with Isabella d 'Aragona, unfortunately only projects, drawings and testimonies of contemporaries remain of this immense heritage. . The great unfinished work, from the Milanese period, however, remains the equestrian monument for Francesco Sforza, the company that fascinates Leonardo who wants to create a statue of grandiose dimensions in which the horse must be the protagonist. In 1493 the terracotta model was ready for bronze casting, but the precious metal was used for the production of weapons to stem the descent of Charles VIII of France. As a tribute to this great lost work, in 1999 the sculptress Nina Akamu created, commissioned by Frederik Meijer who fulfills the wish of Charles Dent, a copy of the horse and placed in front of the San Siro racecourse.