Ancient See of Aarhus

Diocese of Aarhus Dioecesis Arusiensis Aarhus Stift
Aarhus Cathedral, seat of the bishop of Aarhus.
Location
Country	Denmark
Ecclesiastical province	Lund
Metropolitan	Archdiocese of Lund
Information
Denomination	Roman Catholic
Sui iuris church	Latin Church
Rite	Roman Rite
Established	948
Dissolved	1536
Cathedral	Aarhus Cathedral

The Ancient See of Aarhus (Latin: Arusia, Arusiensis) was a pre-reformation Catholic diocese in Denmark. The diocese included the counties (amter) of Aarhus and Randers, the islands of Samsø and Tunø, and, after 1396, part of the county of Viborg.

Frode, King of Jutland, built the church of the Holy Trinity at Aarhus in about 900. In 948 Archbishop Adaldag of Hamburg consecrated Reginbrand as missionary Bishop of Aarhus. Jutland was consolidated into a single diocese after Reginbrand's death in 988, with Viborg or Ribe as its centre. The diocese, then a suffragan of Hamburg-Bremen, was redivided in 1060, and Bishop Christian was ordained by Adalbert I, Archbishop of Hamburg. In 1104 the diocese became a suffragan of the then newly elevated Archdiocese of Lund.

Bishop Ulfketil built a wooden church in 1102 to contain the relics of Saint Clement. In about 1150 the Venerable Niels, Prince of Denmark was buried in the churchyard. The offerings at his tomb facilitated the commencement of a new stone cathedral.

Peder Vognsen, Svend Udsson's successor, began the construction of the stone Cathedral of Saint Clement in 1201, which was finished about 1263. In 1330 the greater part of it was burnt down. Peder Jensen Lodehat (1386-1395) and Bo Mogensen (1395-1423) were the prelates mainly concerned in the erection of the present building.