The Costume Museum is the only museum institution under the direct responsibility of the Sardinia Region, whose activity is focused on documentation and research throughout the region. Its premises, built between the 1950s and 1960s on the hill of S. Onofrio based on a design by the architect Antonio Simon Mossa, look like an imaginary Sardinian village. The museum has recently undergone a major restoration, redevelopment and expansion project. The gallery has a room for temporary exhibitions and an auditorium which, in addition to meetings and study seminars and events promoted by the I.S.R.E., also hosts conferences, concerts and theatrical performances. The museum houses impressive collections of jewellery and traditional Sardinian clothing, musical instruments and a section dedicated to the carnival. The collections include about 8,000 pieces, mainly clothing, jewels, textile and wooden artefacts, weapons, masks, bread, folk music instruments, Sardinian household and working tools and instruments, largely dating back to the period between the end of 19th century and the first half of the 20th century.