The stellar vaulting in the narthex and the two adjacent rooms date to the first phase of building.
The stuccoed cloth hangers (Tuchgehänge), fruit cords (Fruchtschnüre) and 25 angels' heads on the balustrades of the surrounding rood screens were prepared under the direction of Italian stuccoer, Alessandro Pernasione, who had been commissioned by the senior state architect (Oberlandbaumeister), Wolf Caspar von Klengel.