 A convent of Augustinian canons ("monasterium rosarum") was probably established around 960, when the area became part of the Imperial March of Verona.The monastery church dedicated to Saint Peter was consecrated in 1070; it was elevated to the rank of an abbey by the Aquileia patriarch Ulrich of Eppenstein about 1090.At the time, the premises were settled with Benedictine monks descending from Millstatt Abbey in Carinthia, where Ulrich's brother Liutold was duke.