The Sforza Castle (Italian: Castello Sforzesco [kasˈtɛllo sforˈtsesko]; Milanese: Castell Sforzesch [kasˈtɛl sfurˈsɛsk]) is a medieval fortification located in Milan, northern Italy. It was built in the 15th century by Francesco Sforza, Duke of Milan, on the remnants of a 14th-century fortification. Later renovated and enlarged, in the 16th and 17th centuries it was one of the largest citadels in Europe. Extensively rebuilt by Luca Beltrami in 1891–1905, it now houses several of the city's museu