Westminster Cathedral
The site on which the cathedral stands in the City of Westminster was purchased by the Diocese of Westminster in 1885, and construction was completed in 1903. Westminster Cathedral is the largest Catholic church building in England and Wales and the seat of the Archbishop of Westminster.
Imperial Cathedrals
Speyer Cathedral is the world's largest preserved Romanesque church (after the demolition of Cluny Abbey) and today a UNESCO World Heritage Site. It was built starting about 1025 by King Conrad II as a family vault for the ruling Salian dynasty. His successor Henry III donated the Speyer Gospels in 1046; the building was completed in 1061 under the rule of King Henry IV. During the Investiture Controversy with Pope Gregory VIII, he had the church again extended from 1081, in order to stress his Imperial authority. His mortal remains were transferred to the cathedral by his son Henry V in 1111.