The dome is elliptical, with a proportionately high drum in brick. It is disproportionally small in relation to the church building. However it is a neat design, with eight large rectangular windows in Baroque frames separated by pairs of Doric brick pilasters supporting an entablature with a dentillate cornice. The dome itself, in lead, sits on a plinth above this. The lantern is also carefully designed, with Ionic semi-columns separating narrow windows and supporting a cog-wheel entablature. The final cupola is onion-shaped.