The unassuming Oosterkerk, or East Church, used to be a Dutch Reformed Church before its current use as a cultural centre used for concerts and events. Alternatively known as St. Anthony Church, Oosterkerk is located in the centre of Hoorn in the Netherlands.

A designated Rijksmonument, Oosterkerk sports stunning stained glass windows and the only organ built by Johann Heinrich Hartmann Bätz in North Holland. The origins of this Gothic-style church date back to 1450, although construction on the current building was completed in 1616.