The D. Diogo de Sousa Regional Museum houses a diverse collection of archaeological artefacts from the Braga region, spanning a wide range of cultural and chronological periods, from the Palaeolithic era to the Middle Ages.

The Roman artefacts are especially noteworthy, featuring tombstones and everyday objects that provide insight into the lives of people from Bracara Augusta to Rome. Additionally, the museum boasts a highly regarded exhibit on medieval burials.

The museum is dedicated to the memory of Archbishop Diogo de Sousa, who, upon taking office in 1512, worked tirelessly to expand and improve the city and its infrastructure.