The building features effortless brick which is purposely unadorned and you can bare externally
The dome, very high, was hemispherical and put to the pendentives; externally, it is undetectable by the an effective tiburium, a kind of structural shell therefore octagonal. The brand new geometric shape of the newest church is actually hence including some nuclei, all rigorously outlined: part of the human body, the tiburium, brand new apse (polygonal on the exterior, semicircular inside) and you may a great forceps narthex, a tiny square entrance hallway concluded by one or two horizontal apses, here curiously set obliquely and tangent to help you a corner of your own head facade.