Palace Square, connecting Nevsky Prospekt with Palace Bridge leading to Vasilievsky Island, is the central city square of St Petersburg and of the former Russian Empire. Many significant events took place there, including the Bloody Sunday massacre and parts of the October Revolution of 1917. Between 1918 and 1944, it was known as Uritsky Square, in memory of the assassinated leader of the city's Cheka branch, Moisei Uritsky.
The earliest and most celebrated building on the square, the Baroque white-and-turquoise Winter Palace of the Russian tsars, gives the square its name. Although the adjacent buildings are designed in the Neoclassical style, they perfectly match the palace in their scale, rhythm, and monumentality.
Wikipedia https://en.wikipedia.org/wiki/Palace_Square
Address 190000, St Petersburg, Russia
Coordinates 59°56'21.496" N 30°18'55.531" E