Palazzo Valperga Galleani, Baroque palace in Turin, Italy

Palazzo Valperga Galleani stands at via Alfieri 6, on the corner of Via XX Settembre in Turin's Quadrilatero Romano. Maurizio Valperga built it in 1663 by merging and enlarging earlier buildings; Luigi Michele Barberis added the Via Alfieri facade in 1781, replacing the original open suburban-villa layout with a closed scheme.

Maurizio Valperga built the palace in 1663 by merging and enlarging earlier buildings, and lived there himself; in 1667 he became first architect to Carlo Emanuele II of Savoy. In the early 18th century his nephew Giuseppe Antonio Valperga sold it to Count Gian Gerolamo Galleani di Canelli di Barbaresco. In 1781 the Galleani had Luigi Michele Barberis remodel it, replacing Valperga's open suburban-villa layout with a closed scheme and the Via Alfieri facade seen today.

The palace takes its name from the Valperga family and, from the early 18th century, from the Galleani counts of Canelli and Barbaresco, who bought it and had it decorated with frescoes by Cesare Mazzoni. In the 19th century it housed the art collection of lawyer Giuseppe Gattino, with works by Guido Reni, Jan van Huysum and Gerard van Honthorst, and a library. Since 2010 it has been converted into the condominium The Number 6.

The palace stands at via Alfieri 6, on the corner of Via XX Settembre in the Quadrilatero Romano, a short walk from Piazza San Carlo and Piazza C.L.N. Since 2010 it has been converted into the residential condominium The Number 6, so the interior is not open to visitors; the facade by Luigi Michele Barberis can be seen from the street.

In 2015 the renovation that turned the palace into the Number 6 condominium won Building of the Year on ArchDaily as best refurbishment. The 19th-century owner Giuseppe Gattino kept a picture gallery here with works by Guido Reni, Jan van Huysum, Gerard van Honthorst and Polidoro da Caravaggio.