Galileo's house, 14th-century palazzo in Oltrarno, Florence, Italy

Galileo's house is a two-storey building on Costa San Giorgio in Florence, formed from houses at numbers 15, 17, 19 and 21. Its second-floor facade has painted panels and three medallions: allegories of the sciences flank a portrait of Galileo after Justus Sustermans. The door at number 19 carries a plaque, and the side entrances bear silver Galilei coats of arms.

The house dates from the 14th century and was rebuilt in later centuries. Vincenzio Galilei, Galileo's son, bought the first property on Costa San Giorgio in December 1629, on the birth of his first child, and in 1634 the adjoining house was added in Galileo's name. Galileo stayed here in 1638, ill and blind, before returning to Villa Il Gioiello in 1639.

The residence displays the Galilei family coat of arms and a portrait of the scientist on its stone front. The location reflects ties between the family and Florence's community, especially through its proximity to the former Convent of San Girolamo nearby.

The house stands at number 19 on Costa San Giorgio, a street in Florence's hillside area with good views of the city. The neighborhood is relatively quiet and offers access to nearby monuments and museums that are walkable.

The rear facade carries the remains of a sundial dated 1620, long said to have been drawn by Galileo himself. Its fragmentary cartouche actually names another maker: "OPVS BERNARDINI...I MDCXX". The house was bought in 1634 in Galileo's name by his son Vincenzio, after the seller Jacopo Zuccagni refused to recognise the transfer until the supreme magistrate ruled.