Efforts were made to secure the more important pieces of church furniture such as the stained glass and altarpieces, but much of the opulent woodwork such as the altars, pulpits and 1907 organ in its 1820 case were lost to the fire.

Initial measures were put in place to make the site safe in 1950 and the rest of the restoration was almost complete by 1960, led by government architects Karl Band and Wilhelm Schorn.

With few resources and a prevailing consensus to emphasize what had been lost, Band's restoration was "sensitive, but ultimately [left the interior] only as a fragment",[citation needed] producing an almost Protestant effect compared to its pre-war appearance.

[5] Only a few restored or reconstructed furnishings were placed in the building, including the medieval font and the wrought iron Baroque grille.

A new, simple stone high-altar was later added and in 1961 the altarpieces by Cornelius Schut (The Conversion of St Peter) and Rubens returned to the church;[6] and the surviving stained glass windows were reinstalled.