Dumio Monastery - a former convent of the early Christian period, which is located in Dumio, which is a district of Braga. Initially, the site of the monastery was a Roman villa. Its territory is the Basilica built Suevi, a Germanic tribe. The primitive church was built on the orders of King Suevi tribe, Harariha, after the recovery of his son. It was during this king began treatment Suevi to Christianity.

In the VI century on the site it was already founded a monastery, which was headed by Martin Braga, one of the most prominent church leaders in Portugal in the early Middle Ages. Martin Braga is also one of the patron saints of the archbishopric of Braga and has played an important role in the treatment Suevi to Christianity. At the monastery was founded by an autonomous diocese Dumio.

Dumio Monastery - the first monastery appeared on the territory of the Iberian Peninsula. Martin Braga founded several monasteries and convent Dumio is the most famous among them. After the death of Martin Braga was buried in the cathedral monastery Dumio. In the IX century, when a Muslim army approached Brahe, the saint's relics were moved to Mondonedo, and after the victory of the Christians over the Muslims returned to power Dumio. Around the tenth century the religious center is also called the diocese Dumio, fell into neglect.

At the end of the twentieth century were carried out archaeological excavations at the site of the monastery Dumio, during which it became clear that some time in the diocese of the parish church is still there, but not very long. During the excavations were found pottery and coins of the Middle Ages, glassware, amphorae and decorative mosaics of the Roman period. It is interesting to look at and artifacts such as the cover of the sarcophagus, fragments of the foundation pillars, arches and more.

The ruins of the monastery are located around Lugar da Igreya on the square, which is also the parish church Dumio. Here are the church of St. Martin Dumiyskogo, Chapel of Our Lady of the Rosary and the backyard, which was swimming Cash do Assent. During excavations in Dumio it was found such structures as the Roman villa and bath, remains of a basilica, a necropolis of 12 graves, once surrounded by granite slabs.