The 4,335 singers of all ages and from nearly all of the city's professional and amateur choirs sang from the steps of St Isaac's Cathedral before thousands of spectators under an intermittent rain.
The spectators, who closed their umbrellas with the start of Sunday's performance, sang along during the one-hour concert.
The 14 songs performed included some of the most popular and patriotic songs of Russia and the Soviet Union, including a hymn celebrating the country's victory in World War II.