Palazzo San Giacomo, Baroque palace in Russi, Italy.

Palazzo San Giacomo is a Baroque palace in Russi, 15 km southwest of Ravenna, built on the ruins of an old castrum. The 17th-century building was 84.5 m long, with three storeys in the central block and five in the two side towers. The central portal, framed in Istrian stone, carries the Rasponi coat of arms: two intertwined lion paws under a crowned Moor's head.

In 1664 Count Guido Carlo Rasponi, younger brother of Cardinal Cesare Rasponi, bought the Raffanara estate about 2 km from Russi, which held a 12th-century church dedicated to San Giacomo and the ruins of a castrum by the Lamone. The Rasponi built their summer residence on the castle ruins, and Guido Carlo's heirs enlarged it over the following decades. During the Risorgimento the palace, inhabited only in summer, served as a hiding place and meeting site for revolutionaries; after 1880 the family stopped using it.

The piano nobile holds what may be the largest painted cycle in Romagna between the 17th and 18th centuries, frescoed in three separate commissions. Guido Carlo Rasponi ordered the first, in the gallery: the sala dedicated to Cardinal Cesare Rasponi, painted by Cesare Pronti of Cattolica and Filippo Pasquali of Forlì, a pupil in Carlo Cignani's workshop, and the cycle of gods representing the days of the week. Later rooms show zodiac allegories and the four known continents around a ceiling sun, following Cesare Ripa's late-16th-century iconography.

The palace is accessible through guided tours organized by the Municipality of Russi on selected weekends. Visitors should check in advance for current opening dates since access is limited to specific times.

The palace's main gate stood at the centre of a curved stretch of wall projecting beyond the rectangular perimeter toward the Lamone, so the Rasponi could arrive by bucintoro, a Venetian-style state barge. A tower and the church of San Giacomo flanked this gate, both enclosed within the boundary wall.