The Cathedral of Saint Christopher of Belfort (French: Cathédrale Saint-Christophe de Belfort), commonly known as Belfort Cathedral, is a Roman Catholic church located in Belfort, France. The cathedral has been a national monument since 1930.The building that is now the cathedral was built as a church between 1727 and 1750 by the businessman Henri Schuller (or Shuler) (whose son was later a canon here) to plans by Jacques Philippe Mareschal, king's engineer at Strasbourg.