The exact date of its foundation is unknown, but all indications point to origins as a family and double monastery. The oldest documentary news comes from the year 956, but it is very likely that it refers to the earlier double monastery of San Salvador and San Agustín. The first news would therefore be from 1087 when a donation was made to the monastery of Celanova of a quarter of the monastery of Sobrado de Trives. At that time it was a male monastery. From 1175 the documents already confirm the existence of an abbess at its head. In 1228 Alfonso IX established its jurisdiction. It was not a monastery with large possessions. In 1584 Philip II, due to his need for money to finance the royal navy, with prior authorization from Gregory IX, incorporated into the Crown among others the jurisdiction of Sobrado de Trives and its parishes of San Salvador de Sobrado and San Miguel de Somoza. After repeated complaints from Sobrado, the king finally returned its jurisdiction in 1593 through a privilege by which he committed not to take it away again from him or his successors. In 1499 fray Rodrigo de Valencia visited the monastery to initiate the procedures for its incorporation into the Benedictine Congregation of Valladolid, to which its abbess strongly opposed. In 1504 Julius II confirmed its annexation to San Paio de Antealtares. The monastery of San Salvador de Sobrado de Trives was annexed to San Pelayo de Antealtares by Julius II on October 1, 1504. It is a Romanesque temple from the early 12th century. It is one of the most beautiful examples of rural Romanesque in the province. Next to the church, there are still standing remains of the Benedictine nuns’ monastery, which they inhabited until the beginning of the 16th century. It has a detached military tower adapted as a bell tower. It is integrated into the urban area next to the Cobato manor house, built in 1847 and bearing the arms of the Feijoo family; it does not present peculiar characteristics that stand out in its construction.