Externally, First Church successfully replicates the effect, if on a smaller scale, of the late Norman cathedrals of England. The cathedral-like design and size can best be appreciated from the rear. There is an apse flanked by turrets, which are dwarfed by the massive gable containing the great rose window. It is this large circular window which after the spire becomes the focal point of the rear elevations. The whole architectural essay appears here almost European. Inside, instead of the stone vaulted ceiling of a Norman cathedral, there are hammer beams supporting a ceiling of pitched wood and a stone pointed arch acts as a simple proscenium to the central pulpit. Above this diffused light enters through a rose window of stained glass. This is flanked by further lights on the lower level, while twin organ pipes emphasise the symmetry of the pulpit.