The monastery received the Cistercian Order in the 12th century.
It was established in the 13th century after the Queen of Castela, D. Mafalda - the daughter of King D. Sancho I of Portugal - retreated to the monastery and who was also later buried there.
Of roman classicism style, it underwent several interventions in the 17th and 18th centuries; once of baroque style, it was restored in the 20th century in two distinct phases and remains in a reasonable state of conservation.
It has remarkable areas, such as the Church, the Nuns Chancel, and the Cloister, the dining hall, the kitchen and the Museum of Sacred Art. The south wing, however, is vacant and has all the necessary conditions to be turned into an accommodation establishment. The special highlights are the baroque elements presented in gilded wood, the majestic organ which is in very good condition (and still working), several vaulted areas on the bottom floors and a great diversity of wooden ceilings, some of which are painted, coffered or trough ceilings.
In the old enclosure of the monastery there are three buildings which may be used as an accommodation establishment (the old infirmary, the old pharmacy, which has access to the southern wing, and a small building of traditional architecture), as well as a scented garden.
The area designated for touristic purposes is the southern wing.