A nunnery was founded by
Count Sunyer I and his wife
Richilda of Toulouse next to an ancient church dedicated to
Saint Saturnin. The church was consecrated on 16 June 945 by Bishop Guilarà. The first abbess was Adelaide, widow of
Count Sunifred of Urgell. In 985, the monastery was attacked by the troops of
Almanzor.
Count Borrell II restored it; the new abbess was Adalet. The monastery grew slowly. At the end of the 10th century, the community was composed of a dozen religious. In the following century, the number rose to 20, most of them daughters of nobles of the time. The powerful religious families were responsible to financially support the monastery. In 1147, a new, larger church, encompassing both the monastery and the old church dedicated to Saint Saturnin, was consecrated. The community suffered with the 1835 secularization and the monastery became a prison. In 1879, the religious community moved to a new location in the district of
Sarrià-Sant Gervasi. In 1873, the cloister and other sections was removed. The monastery suffered a fire in 1909 after which it was rebuilt. A new fire ravaged the building during the
Spanish Civil War in 1939. ==Architecture and fittings==