Cathédrale du Sacré-Cœur d'Alger (Sacred Heart Cathedral of Algiers) is a Roman Catholic church located in Algiers, Algeria. Completed in 1956, it became the new cathedral in the capital after the Cathedral of Saint Philip of Algiers reconverted into a Muslim Ketchaoua Mosque. The Cathédrale du Sacré-Cœur d'Alger is the cathedral church of the Archdiocese of Algiers.