The church of San Nicola, in German Sankt Nikolai Kirche, is a nineteenth-century building in Hamburg of which only the bell tower remains, one of the tallest in the world.
During the Second World War it was partially destroyed by bombing, so that the slender bell tower above all remains of the original building, which today has a commemorative value against the war. In fact, it was decided to restore the bell tower, but to demolish the rest of the building, which was reduced to very bad conditions. In the 90s a carillon was built inside the bell tower. The crypt of the church now houses a documentation center.