Frederik's Church, also known as The Marble Church, is an 18th-century neoclassical church located in Copenhagen, Denmark. The church was designed by architect Nicolai Eigtved and construction began in 1749. However, Eigtved died in 1754 and the church was completed by his colleague, Lauritz de Thurah.

The church is named after King Frederik V, who initiated its construction. It is notable for its impressive dome, which has a diameter of 31 meters and a height of 46 meters. The dome is supported by twelve columns and is made of copper covered with lead.

The exterior of the church is made of marble, hence the name "The Marble Church". The interior is decorated with intricate details and is dominated by the impressive dome. The church has a capacity of 1,800 people and is used for regular worship services as well as concerts and events.

During the Second World War, the church was used as a storage facility for the Danish Jewish community's Torah scrolls, which were later returned to their rightful owners after the war. Today, Frederik's Church is one of the most iconic landmarks in Copenhagen and is a popular tourist attraction.