This church was built on the site of the old Staufen chapel in 1290, For a long time it was in the shadow of the cathedral as a daughter church of the monastery of St. Bartholomew, but gradually its importance for Frankfurters grew in parallel with the growing importance of Roemerberg in relation to the Cathedral Square. The construction of new altars and the reconstruction of the church was already at the expense of the citizens of the city and the city council. All this stopped with the Reformation, in which Frankfurt sided with the Protestants. In 1530, Catholic Mass and church services in Frankfurt were abolished. The Church of St. St. Nicholas was closed, the altars were demolished in 1543. After the Peace of Augsburg in 1548, the cathedral was returned to Catholics, and the Nikolaikirche remained closed for services and was used as an archive, warehouse and God knows what else... After more than a century and a half, the Nikolaikirche was re-consecrated in 1721 after restoration as an evangelical one. Actually, this can be seen from the modest interior. The church looks about the same as in the XVI century. Surprisingly, the terrible British bombing of 1943-44, which turned almost the whole of Frankfurt into ruins in general and the Old City in particular, did not affect the church much. Only the roof burned down, which is not much in terms of the scale of destruction of other buildings. So the church is the little that remains of the real old Roemerberg.