The little treasure of the Celanova-Limia geodestination is called San Miguel de Celanova. This small building has remained intact for over a millennium inside the large Galician monastery and is the only memory of the time when it was ran by the almost mythical San Rosendo. It is the only early medieval Spanish monument that has not undergone any changes since it was built in the 10th century. The small oratory whose layout is unprecedented in Christian architecture is reminiscent of the arrangement of Muslim oratorios or a domestic bath in Medina al-Zahra. Another of the gems in this area is the Church of Santa Comba de Bande, which is possibly the most important still-existing link for studying all the 7th-century Visigothic architecture.
But the Castro culture is also present in the Celanova-Limia geodestination in enclaves such as the archaeological site of Castromao, which happens to be one of the main references of the fortified pre-Roman Iron Age villages of the northwest Peninsula, both because of its long presence over time (at least from the 5th century B.C. to the 2nd century A.D.) and of the wealth of documents that have come to light from successive excavations and investigations that have been carried out in it. Unique pieces such as the triskelion, a tabula, a zoomorphic figure and a little treasure of coins from the 1st century, all preserved in the Museo Arqueológico Provincial.