​Santa Costanza is a 4th-century church in Rome, Italy. Originally built by Constantine as a mausoleum for his daughter Constantina, later also known as Costanza. The centralized design puts direct emphasis on the person the mausoleum was intended for. The structure is built of brick-faced concrete and is composed of two rings supported by columns placed around a vertical central axis. This design creates two spaces, that of the ambulatory and that of the upper dome. An arched arcade with twelve pairs of granite columns decorated with composite capitals supports the drum below the dome. The screens of the ambulatory and inner ring create a dark contrast to the bright upper space of the dome.