Abbey of St. Gall in the context of "Roman Catholic Diocese of Saint Gallen"

The canton of St. Gallen or St Gall (German: Kanton St. Gallen [zaŋkt ˈɡalən] ; Romansh: Chantun Son Gagl; French: Canton de Saint-Gall; Italian: Canton San Gallo) is a canton of Switzerland. Its capital is St. Gallen.

Located in northeastern Switzerland, the canton has an area of 2,026 km (782 sq mi) (5% of Switzerland) and a resident population close to half a million as of 2015 (6% of Switzerland). It was formed in 1803 as a conflation of the city of St. Gallen, the territories of the Abbey of St. Gall and various former subject territories of the Old Swiss Confederacy.

Cotefredus (also Gotfrid or Gotefrid, modernized Gottfried) (c. 650–709) was the Duke of Alamannia in the late 7th century and until his death. He was of the house of the Agilolfing, which was the dominant ruling family in the Frankish Duchy of Bavaria.

In a document dated to the year 700 in Cannstatt, Cotefredus at the request of a priest named Magulfus donated the castle of Biberburg to the monastery of Saint Gall.

The Stiftskirche St. Gallus und Otmar (Collegiate Church of St. Gall and Otmar) is a Roman Catholic church in the city of St. Gallen, Switzerland. Once part of the Abbey of St. Gall, it has been the cathedral of the Diocese of St. Gallen since 1847. It is considered one of the last great sacred structures of the Baroque era, and is a UNESCO World Heritage site.

Othmar, (also Audomar, c. 689 – c. 759) was a Medieval monk and priest. He served as the first abbot of the Abbey of St. Gall, a Benedictine monastery near where the city of St. Gallen, now in Switzerland, developed.