The cathedral's facades are decorated with sculptures and massive granite columns (made of single pieces of red granite), while the interior is adorned with incredibly detailed mosaic icons, paintings and columns made of malachite and lapis lazuli. A large, brightly colored stained glass window of the "Resurrected Christ" takes pride of place inside the main altar. The church, designed to accommodate 14,000 standing worshipers, was closed in the early 1930s by the communist soviet government. Under the Soviet government, the building was stripped of religious trappings and reopened as a museum. Today, church services are held here only on major ecclesiastical occasions.