|Braganša - Domus municipalis is a building of Romanesque architecture, unique in the Iberian Peninsula.
It has the shape of an irregular pentagon and an underground area forming a vaulted cistern. It was constructed during the 12th century.
No one knows exactly what was the real function of this building even after the great amount of research carried out during the last years.
It could eventually serve as a cistern but some authors have doubts if this was its real function. In the 14th century it was elevated to Municipal Chamber (town hall).
This building is classified by the IPPAR since 1910 as a National Monument.|