The museum, housed in a traditional 19th century Campidano farmhouse in Las Plassas, charts the society, institutions, economy, faith and daily lives of the island's Medieval rural communities.
It includes both finds from excavations at the castello di Marmilla and artefacts found in the countryside round the village, dating back to the ancient period.

A very interesting find is a Roman epigraph, from the I century A.D., commemorating the dedication of a temple to Jupiter Optimus Maximus.
The castle, recently excavated and restored, stood watch over the eastern borders of the Giudicato (Medieval Kingdom) of Arborea and has yielded important evidence of daily life in the Middle Ages.
Finds comprise pottery objects, including some of notable make, dating from the 13th to the 16th centuries, fragments of an animal-pulled grindstone, fragments of weapons, and architectural elements, including a late Romanesque capital, already reported by archaeologist Giovanni Lilliu in the 1950s, depicting two praying figures.

The exhibition is completed by information panels with texts and pictures, and by examples of peasants' and gentry clothing, traditional foods and cooking methods, and the tools and products of farmland and pastures.

Address: via Manzoni, 4 - 09020 Las Plassas Phone + 39 070 9364006 Managing Agency: Municipality of Las Plassas