The first foundations were laid in 1037 but the cathedral took two decades to complete. The structure has 5 naves, 5 apses, and (quite surprisingly for Byzantine architecture) 13 cupolas. It is surrounded by two-tier galleries from three sides. Measuring 37 by 55 meters, the exterior used to be faced with plinths. On the inside, it retains mosaics and frescos from the eleventh century, including a dilapidated representation of Yaroslav`s family.
