Palazzo del Magnifico, Renaissance palace in Piazza San Giovanni, Siena, Italy.

The Palazzo del Magnifico is a Renaissance palace near the Baptistery, distinguished by solid walls and finely crafted windows. The interior displays a succession of salons whose ceilings were extensively decorated by major artists of the period.

Pandolfo Petrucci, who effectively ruled Siena from 1487 to 1512, had the palace built in 1508 by Domenico di Bartolomeo to a design by Giacomo Cozzarelli. Its main salon was decorated by 1509, probably for the wedding of his son Borghese to Vittoria Piccolomini on 22 September. After Petrucci died in 1512 and Borghese was ousted months later, the decorations were dispersed.

The palace reflects the artistic vision of its era through elaborately designed rooms that continue to engage visitors today. Its style merges Florentine elegance with local Sienese traditions, creating a space where art and authority converged.

The palace stands on Piazza San Giovanni at the corner of Via dei Pellegrini, a short walk from Siena's Baptistery and the Duomo. The main hall was on the piano nobile, the upper floor, so the rooms are reached by stairs. The facade's bronze bells and bracelets are no longer in place; they are kept in the Palazzo Pubblico.

Parts of the original ceiling paintings from the main hall are no longer on site but were transferred to a famous museum in New York. This displacement shows how major artworks became dispersed across continents and shaped the history of collections.