Great Church, Groenmarkt 7.
Three-aisled basilica with Romanesque and classicist features, designed by the architect Isaac Warnsinck, together with his student Abraham Nicolaas Godefroy Externally sober with brick facade surfaces, in which large round arch windows with cast iron armours. Buttresses, crowned by acroteria, round arch friezes in Romanesque style, classical profiled drip moulding under the windows. Plastered interior with pillars, connected by arcades and wooden vaulting over the main nave. The church was built against the east facade of the St. John's tower on the foundations of the Gothic cruciform church that was demolished in 1844.
The organ (Bätz-Witte) was installed in 1853. After the restoration in 1960 (Blank) the organ has 41 stops.
(National Monuments Register 381885)