Church of Saint Mary of the Port      This monastery might have been constructed as a consequence of the repopulation made by the Asturian king Alphonse I in Liébana, Trasmiera, Sopueta, Carranza and Vardulia, half-way through the 8th century. The first record of the construction was found in the monastery of Oņa, Burgos, and refers to the year 836. CHARACTERISTICS The existing church, built in the 13th century, is a proto-Gothic or transition building: Although the former head of the church no longer exists, some parts of the construction belonging to the end of the 12th century still remain. The construction has three naves, the central one being the widest and highest. It opens out onto the side naves by means of semicircular arches in the Roman style. The capitals are continuous but still have Roman elements, with iconographic motifs from Heaven, Hell, a boar’s head, decapitated heads, etc. GOTHIC STYLE WITH FLEMISH PAINTINGS The most marked features are in the single fan tracery vaulting. The work done on the apse and head in 1534 ended in the original head. The church houses one of the most attractive Flemish works in Spain: the altarpiece of San Bartolomé. Six tablets are framed in a structure consisting of three storeys and three aisles, the work of Petrus Nicolai, from Bruges (Pieter de Moor), painted at the beginning of the 16th century with the influence of Memling. It is also worth mentioning the main altarpiece, from the 16th century, and the altarpiece of San Pedro, dating from the beginning of the 17th century.