The Abbey of Saint Gall () is a dissolved abbey (747–1805) in a Catholic religious complex in the city of St. Gallen in Switzerland. The Carolingian-era monastery existed from 719, founded by Saint Othmar on the spot where Saint Gall had erected his hermitage. It became an independent principality between 9th and 13th centuries, and was for many centuries one of the chief Benedictine abbeys in Europe. The library of the Abbey is one of the oldest monastic libraries in the world. The city of St. Gallen originated as an adjoining settlement of the abbey. The abbey was secularized around 1800, and in 1848 its former church became a Cathedral. Since 1983 the abbey precinct has been a UNESCO World Heritage Site. History Foundation Around 612 Gallus, according to tradition an Irish monk and disciple and companion of Saint Columbanus, established a hermitage on the site that would become the monastery. He lived in his cell until his death in 646, and was buried there in Arbon (Canton of Thurgau). Afterwards, the people venerated him as a saint and prayed at his tomb for his intercession in times of danger. Following Gallus' death, his disciples remained living together in his cell and followed the rule of St. Columban, which combined prayer, work of the hands, reading, and teaching. They aided and taught virtue to the many pilgrims who came to St. Gall's tomb. St. Magnus was the first successor of St. Gallen, but he soon left on a mission to Allgäu, Swabia. His successors were the deacon Stephen and the priest Magulfe, under whom the news of St. Gallen's miracles spread throughout most of Germany. Several different dates are given for the foundation of the monastery, including 719, 720, 747 and the middle of the 8th century. A gentleman and judge of Thurgau, Waltraf (possibly, Waltram or Gaudran), in order to use the alms and collections that were being given at St. Gall's tomb to found a more regular monastery, attracted a local Alemannic pastor Otmar. Waltraf went to see Charles Martel, gave him the property of the hermitage, and asked him to give the administration of it to Otmar. Charles agreed and sent Otmar the finances to build a monastery. After the death of Charles Martel, his son Pepin continued to support them. On the recommendation of his brother Carloman, who had visited this monastery on his way to