The Jordan Staircase in the Winter Palace.
The Main Staircase of the Winter Palace was restored after the 1837 fire by Vasily Stasov, who in the main retained Rastrelli’s concept. Two broad flights of marble steps lead up to a landing embellished with grey granite columns. The 18th-century ceiling painting by Gasparo Diziani depicting Mount Olympus visually enlarges the interior that is transfused with light, gleaming gold and mirrors. The staircase is adorned with statues, some of which were brought from Italy in Peter the Great’s reign. In the 18th century it was known as the Ambassadors’ Staircase, later the Jordan Staircase, since the imperial family used it to descend to the Neva at Epiphany for the ceremony of the Blessing of Waters (in which the river symbolized the Jordan). Source