The Reggia di Val Casotto, or Valcasotto is a former royal residence located in Garessio, region of Piedmont, Italy.
A structure at the site was founded in the 11th century as the Certosa di San Brunone (Charterhouse of St Bruno) housing monks of the cloistered Carthusian order.
Earlier in the 18th century, under the direction of the architects Francesco Gallo and Bernardo Vittone, part had been refurbished into a rural palace.
In 1837, King Charles Albert of Sardinia refurbished it again, accentuating the castle like elements.
The residence is one of the Residenze Sabaude considered by UNESCO a World Heritage Site.