Frederikskirken, Known as The Marble Church (Marmorkirken) is an Evangelical Lutheran church.

The foundation stone was set by king Frederick V on October 31, 1749, but the construction was slowed by budget cuts and the death of Eigtved in 1754. The church was left incomplete and, in spite of several initiatives to complete it, stood as a ruin for nearly 150 years. The church was finally opened to the public on August 19, 1894.

Inscribed in gold lettering on the entablature of the front portico are the words: HERRENS ORD BLIVER EVINDELIG "the word of the Lord endure for ever."