Palazzo Gondi stretches across the area between Piazza Signoria and Piazza San Firenze. It was built by Giuliano da Sangallo for Giuliano di Lionardo Gondi, taking example from stately building masterpieces such as Palazzo Medici and Palazzo Strozzi. Its shape is cubic and it is made of bossage stone. It has a central courtyard and three floors, with two main doors overlooking the square. In the inner courtyard there is a beautiful fountain, which, thanks to a concession made by the Grand Duke Cosimo I, uses the same water that feeds the Fountain of Neptune in Piazza della Signoria. The relationship between the Medici family and the Gondi family was consolidated not only by friendship and by alliances, but also by kinship: Caterina dei Medici was a cousin of Cosimo I, whose great-grandmother was Maddalena Gondi Salviati. Leonardo Da Vinci's father also lived in Palazzo Gondi, before its extension, as a commemorative plaque tells us.
An interesting fact concerns the original drawing by Leonardo Da Vinci, which is kept at the Musée Bonnat in France and portrays the hanging of Bernardo Bandini Baroncelli, one of the protagonists of the Pazzi Conspiracy: it was drawn by Leonardo from a window of Palazzo Gondi, where he lived, and from which he probably watched the scene.