Its exact original appearance is unknown but there is evidence that it was not a very sizable building, it doubtless must have been much smaller than it is today. Furthermore, except for its Gothic presbytery with stone ribs, it had little artistic value.

It stood by itself, forming a part of the city's fortifications. At those times the church had no side chapels, it is not clear either how large its lateral naves were. During the reconstruction of the church between 1715 and 1719 the church was connected to the tower and two side chapels dedicated to St. Anna and St. Joseph were added to it.

In 1857 a new main entrance to the church was made by breaking through the wall of the tower at ground level. Finishing touches to the new entrance included an imitation of Gothic stonework.