The interior of the temple consists of an elevated part with two chapels, three nave corps and as many as the chancel, five further chapels, side porches and sacristy. Its length is 57.5 meters, the width is 23.3 to 29.3 meters (with chapels 37) and the vaults are 13 meters high. All the aisles are of the same height - the church is built in the hall system. The interior has 5 entrances and 31 windows are illuminated. The dramatic fate of the temple deprived her of the stained glass. Reconstructed vaults (in the main nave and starboard chapel, in the side nails of the crystal) are supported on 16 pillars. Formerly there were also in the chancel and chapels 18 altars, 2 of which disappeared during the Reformation, and 9 in the 18th century. To date, two altars have been completed, or almost complete, and fragments of 5 more - in the National Museum in Warsaw and in Gdańsk. The last war survived about 40% of pre-war equipment