
Palazzo Sacchetti, located in via Giulia, 66, was built from 1543 on by Antionio da Sangallo, the architect of Palazzo Farnese, for himself. In 1525, da Sangallo had married Isabella Deti, a patrician lady from Florence, and thus a representative home was needed. He acquired a unfinished palace, consisting of a ground floor, and completed it with a piano nobile. Initially, the palace only had five window axis on via Giulia and eight on Vicolo del Cefalo. While the ground floor has a corner bossage and "kneeling" rectangular windows with somptuous consoles, Sangallo's upper floor lacks, except the windows' consoles, and architectural decoration. Francesco Salviati, who also participated in the decoration of Palazzo Farnese, frescoes the Sala dei Mappamondi.
Six years after Antonio's death, his son Orazio sold the palace to cardinal Giulio Ricci, who let add a second upper floor, adopting the forms of the first, and convert the central window into a balcony. In 1576, when Ricci moved to his Palazzo Ricci Paracciani, the palace was acquired by the banker Tiberio Ceoli. Since 1649, the marchesi Sacchetti, originally from Florence, are the proprietors of the palace. Carlo Rainaldi built a garden nymphaeum in 1660, and a gallery with rich stucco works was built in the palace.
Frommel, Christoph Luitpold: Der römische Palastbau der Hochrenaissance, Tübingen 1973, tom. II, pp. 292-304
Schütze, Sebastian: Palazzo Sacchetti. Roma 2003
Sung Yong Cho, I progetti e la realizzazione del palazzo Sangallo in Via Giulia a Roma, in: Quaderni dell'Istituto di Storia dell'Architettura, 40.2002 pp. 39-52