"Less than a century after its completion in 1521, the tower, which had been converted into a gunpowder magazine, collapsed. The current edifice is the result of a tireless study of the available documents and iconography, by Luca Beltrami, in order to reconstruct the tower as faithfully to the renaissance original as possible. Inaugurated in 1905, the Filarete tower was dedicated to King Umberto I, assassinated only 5 years earlier in Monza. Beltrami inserted a clock into the top cubic section of the tower, whose radiant sun motif was inspired by the Sforza coat of arms. In addition he commissioned Luigi Secchi to sculpt a statue of Saint Ambrose in late 14th century style for the niche, as well as a Candoglia marble bas-relief portraying Umberto I on horseback. Finally, in commemoration of the Sforza, Beltrami decided to add to the tower the painted coats of arms of Francesco, Galeazzo Maria, Gian Galeazzo, Ludovico il Moro, Massimiliano and Francesco II." - Milano Castello: The Filarete Tower (online May 2016)