The initial design was made reputedly by
Cosimo Fanzago in the late
16th century. In 1754–1762, the architects
Mario Gioffredo and later
Luigi Vanvitelli refurbished the palace as we mainly see it today, for the Duchess Marianna de Sangro di Casacalenda. It is said that during this construction, the Byzantine-era church of Santa Maria della Rotonda was demolished. That church putatively had been erected by
Emperor Constantine atop a temple of Vesta. The columns of the temple are now in use in the courtyard. The design of monumental
pilasters of the top floors of the facade are attributed to
Mario Gioffredo. In 1831, the palace was sold by the Sangro family to the Del Balzo family In 1922, as part of the urban renewal of Naples and to widen Via Mezzocannone, the easternmost bay of the palace was demolished, requiring the removal of frescoes from this part of the
piano nobile. The frescoes were relocated to the
Museum of Capodimonte. File:Palazzo Sangro Cortile.jpg|Courtyard File:Tavola strozzi (flotta aragonese al ritorno della battaglia di ischia il 12 luglio 1465), 1465-1500 ca., 11982, 05 (cropped).JPG|Alleged depiction of
Santa Maria della Rotonda on
Tavola Strozzi ==References==