Frederik's Church, popularly known as The Marble Church for its rococo architecture, is an Evangelical Lutheran church in Copenhagen, Denmark. The church forms the focal point of the Frederiksstaden district; it is located due west of Amalienborg Palace.

The Evangelical-Lutheran Church in Denmark or National Church, sometimes called the Church of Denmark, is the established, state-supported church in Denmark. The supreme secular authority of the church is composed of the reigning monarch and Denmark's Parliament, the Folketing. As of 1 January 2024, 71.4% of the population of Denmark are members, though membership is voluntary.