Coordinates: 43°44′51.25″N 11°15′27.23″E / 43.7475694°N 11.2575639°E
Villa il Gioiello ("The Jewel") is a villa in Florence, central Italy, famous for being one of the residences of Galileo Galilei, which he lived in from 1631 until his death in 1642. It is also known as Villa Galileo (not to be confused with the other homes of Galileo found in Florence, which are in Costa San Giorgio, as well as a villa in Bellosguardo).
The name Gioiello was given due to its favorable position in the hills of Arcetri, near the Torre del Gallo. It was an elegant home, surrounded by many acres of farmland with a separate house for workers. It is recorded in the cadastre of 1427 to have been owned by Tommaso di Cristofano Masi and his brothers, who later passed it on to the Calderini family in 1525, where it is first mentioned as "The Jewel". The villa and its estate suffered damages during the siege of Florence in the years 1529 and 1530, whilst the entire area of Arcetri and Pian dei Giullari were occupied by Imperial troops. Calderini I sold it shortly thereafter to the Cavalcanti family, who rebuilt the home with its original simple lines, preserving its elegant look to the present day.
This rented residence with its fields, adjoined the monastery where his daughter, Sister Maria Celeste (born Virginia) was a nun. There are 124 remaining letters from Celeste to Galileo (the replies of the scientist were probably destroyed) which were filed after his death (at the State Archive of Florence) in the inventory of property owned by Galileo. Galileo's books are now held in the Biblioteca Nazionale Centrale di Firenze and are the subject of a celebratory exhibit: Galileiana 2009.