The Cathedral of Our Lady of the Assumption — Notre-Dame de l'Assomption — is the Catholic cathedral of Cap-Haïtien and the seat of the Archdiocese. The current building replaced a predecessor destroyed in the great earthquake of 1842. It stands on the main square of the city, a neoclassical structure with twin towers that has been the religious and civic anchor of Cap-Haïtien since the nineteenth century.
The interior is notable for its Haitian-style religious art and painted decorations. Mass is well-attended and the cathedral is an active centre of community life. The square in front is one of the main gathering points of the city, particularly in the evenings.