Roskilde Cathedral, in the city of Roskilde on the island of Zealand (Sjælland) in eastern Denmark, is a cathedral of the Lutheran Church of Denmark. The first Gothic cathedral to be built of brick, it encouraged the spread of the Brick Gothic style throughout Northern Europe. Constructed during the 12th and 13th centuries, the cathedral incorporates both Gothic and Romanesque architectural features in its design. Until the 20th century, it was Zealand's only cathedral.