Palazzo Contarini Polignac, Renaissance palace in Dorsoduro, Venice, Italy.

Palazzo Contarini Polignac is a three-storey Renaissance palace on the Grand Canal in Dorsoduro, between Palazzo Brandolin Rota and Palazzo Balbi Valier. Its facade is covered in polished polychrome marble, with two noble floors each centred on a round-arched pentafora flanked by two single-lancet windows; the ground floor has six round-arched openings and a central water portal. The left side has a three-light window and a covered terrace above a canal-side garden.

The palace dates to the second half of the 15th century, one of Venice's first Renaissance buildings, with an unknown architect often identified as Giovanni Buora, Mauro Codussi or Pietro Lombardo. The Contarini dal Zaffo family rebuilt it between 1562 and 1582 without changing the exterior. From 1758 it passed to the Manzoni, Angaran and Polignac families; Winaretta Singer, Princess of Polignac, bought it in 1901, and it remains a private residence of the Decazes family, restored 2004–2007.

The palace takes its second name from Winaretta Singer, daughter of sewing-machine magnate Isaac Singer, who bought it in 1901 as Princess of Polignac. Her salon drew figures from the arts, music above all, and Igor Stravinsky was among its guests. The Tiepolo frescoes inside survive in good condition.

The palace sits directly on the Grand Canal and is best seen from the water, for example from a vaporetto passing along the Dorsoduro side. Access to the interior depends on current events or programming, so it is worth checking in advance whether the building is open to visitors.

The name comes from Giorgio Contarini, who held the title Count of Jaffa (Zaffo) in Palestine; it records a title, not a trading house. A 1908 painting by Claude Monet shows the palace facade, one of three Venetian palazzi he painted, alongside Ca' Dario and Palazzo Da Mula Morosini.