Roskilde (titular see)

Diocese of Roskilde Dioecesis Roskildensis Roskilde Stift
Roskilde Cathedral, the seat of the Bishop of Roskilde.
Location
Country	Denmark
Ecclesiastical province	Lund
Metropolitan	Archdiocese of Lund
Information
Denomination	Roman Catholic
Sui iuris church	Latin Church
Rite	Roman Rite
Established	991
Dissolved	1536
Cathedral	Roskilde Cathedral

The Roman-Catholic Diocese of Roskilde (Danish: Roskildes Stift) was a diocese within the Roman-Catholic Church which was established in Denmark some time before 1022 and lasted until the Lutheran Reformation.

The episcopal see of the Bishop was Roskilde Cathedral but from 1167, when Bishop Absalon completed a new bishop's palace known as Absalon's Castle on the small island of Slotsholmen, he resided at the small town of Havn, which later became the present Danish capital Copenhagen.

The diocese originally included both the island of Zealand and Scania (southern Sweden, then part of Denmark), but Scania was disjoined in 1060 and initially divided into the short-lived Diocese of Dalby and the Diocese of Lund, which absorbed the first and became the Metropolitan of (southern) Scandinavia.

The diocese was dissolved with the Reformation of Denmark and replaced by the Protestant Diocese of Zealand in 1537.

In 1868, the Roman Catholic Diocese of Copenhagen was established with St. Ansgar's Cathedral as the seat.

In 1922, the Protestant Diocese of Zealand was divided into the Diocese of Copenhagen and the Diocese of Roskilde.