In 1616, cardinal Pietro Aldobrandini, nephew of Clement VIII, repurchased the family home, resuming construction and incorporating various houses adjacent to the wing facing the future square. In 1659 it was purchased by the House of Chigi, a rich family of bankers from Siena. It was then remodelled by Felice della Greca and Giovanni Battista Contini. It has five floors, a broad stairway that leads to the living rooms, and a courtyard decorated with a fountain, designed by Giacomo della Porta. The fountain has been copied in many sites in Rome and other Italian cities.
