This is a four-pillar single-domed church with three apses. An impression of space is given by the inward tapering of the walls. The only decoration is a wide three-tiered band. The construction material is regular white limestone blocks. The interior walls are decorated with frescoes by Rublev and Chernyi, who were also responsible for the iconostasis, which includes Rublev•s masterpiece, the icon of The Trinity. It has a gilded dome, the gilding being carried out on the orders of Ivan the Terrible in 1556 to celebrate the seizure of Kazan