It is a place of sharing, learning, and education for the community and by the community, through events, exhibitions, workshops, and courses. It is a space without boundaries or barriers where everyone has access to content, activities, and stimuli.

It is housed in a historic building from the 19th century, once known as Casa della Colletta, from which the street takes its name. In this initial phase, it was used for the storage and distribution of ecclesiastical alms. It then housed the barracks of the Cavalleggeri di Sardegna, the Town Hall, the station of the Carabinieri Corps, the Library, and the Archive. In the 1990s, it became a museum. Today it hosts three collections: one archaeological, one dedicated to the artist F. D'Aspro, and another dedicated to works by other local and international artists.

The MuA is a cultural project that brings together two important realities of Sinnai: the Historical Archive and the Civic Museum. The two services collaborate and interact to improve and promote activities for everyone, adults, children, schools, covering various fields: art, archaeology, history, cinema, music, food and wine, creative writing, traditions.

The Mua hosts a bookshop in the headquarters of the Civic Museum, with two main sections: large and small. Inside, it is possible to find books on archaeology, art, fiction, ethnography, tourism, in Italian, Sardinian, English, German, French. There are also objects of local tradition such as the baskets of Sinnai, artistic craftsmanship, gadgets, and games.

It is a lively, open, stimulating, and educational space through exhibitions, workshops, and competitions. It is a heritage of the community not only of Sinnai. It preserves the documents of the Municipality and other local authorities, from the communal acts of the 18th century to the documentation of the second half of the 20th century. It is a tool to get to know Sinnai, the surrounding area, the people, and the life of the community over the past centuries.

It is located on the ground floor of what was once the villa of Benvenuto Dol. In 1960, it was reorganized to house the Town Hall and the prison, the latter located precisely in the premises where the Archive documents are now stored.