This was founded in 730-735. In 899 it was sacked by the Magyars but St. Mary’s Abbey rose again and was fortified in the 10th century. In 967 Emperor Otto I donated the abbey to Rodoaldo, the patriarch of Aquileia. From 1441 - 1786 the abbey became a commendam and in 1818 the religious jurisdiction returned to the diocese of Concordia and the abbey was finally re-established in 1921.
The first walls were created in the 10th century, after the devastation caused by the Magyars. The facade is dominated by a fresco representing the lion of St. Mark, dating back to the late 15th century. Below it is a bas-relief with the crest of cardinal Grimani, to the left is a fresco where the Grimani crest is repeated and to the right there is a fresco of a crest with a cross, whose ownership is unknown.
Beyond the entry tower you access a large courtyard that has recently been paved, onto which all the main buildings of the abbey complex look. There is also a brick bell tower here.