The Aligi Sassu Museum is located in the city center of Thiesi in the province of Sassari. The Museum is dedicated to the artist Aligi Sassu, one of the most important protagonists of twentieth century Italian art. Commissioned thanks to the Sassu Foundation and the Municipality of Thiesi, the collection collects 120 works created by the artist between 1929 and 1995 using various graphic techniques: etching, aquatint, drypoint and lithography. There are 10 lithographs dedicated to the theme of the horse: "The Emperor's Horses", from 1989, inspired by a series of Japanese votive tablets; the folder “In the clouds my horses”, with the etchings “Ettore and Achille III” and “Achille e Xanto”; the folder of nine color etchings with aquatint and drypoint, "The Myth of the Mediterranean", from 1989-90 (introduction by Werner Spies), including "The big red horse" and "The horses of Poseidon". The museum is embellished by the large fresco created in the early sixties of the last century in memory of the Anti-feudal Motions of which Thiesi was the promoter, for the affirmation of the rights towards the feudal lord the Duke Manca dell'Asinara, in which an episode of the popular uprising. In the lower part, an imposing figure made in relief with pink trachyte and volcanic stone represents Sardinia rising again.