1. Sforza Castle (Castello Sforzesco) is a fortress located in the heart of Milan, Italy. It was built in the 15th century by the Duke of Milan, Francesco Sforza, to serve as a military stronghold and a residence for the ruling family of Milan. The castle has been used for various purposes throughout its history, including a barracks, a prison, and as a venue for art exhibitions. Today, it houses several museums and art collections, including the Museum of Ancient Art, the Museum of Musical Instruments, and the Egyptian Museum.

Some interesting facts about Sforza Castle include:

- The castle was renovated and enlarged several times throughout the centuries, with major construction work taking place during the Renaissance period.

- The castle was heavily damaged during World War II and was later restored and reopened to the public in the 1950s.

- The castle’s iconic Filarete Tower, named after its architect Antonio Averulino (also known as Filarete), is one of the most recognizable landmarks in Milan.

2. Sforza Castle is open daily from 7 am to 7:30 pm (last entry at 6:30 pm). The phone number for the castle is +39 02 8846 3700.

3. Admission to Sforza Castle is free, although some individual museums and exhibitions inside may charge an entrance fee. The castle can be easily reached by public transportation, including metro lines M1 and M2 and various bus and tram lines.