The Catherine Palace is a Rococo palace in Tsarskoye Selo, 30 km south of St. Petersburg, Russia. It was the summer residence of the Russian tsars.
Wikipedia https://en.wikipedia.org/wiki/Catherine_Palace
Official Website http://tzar.ru/
Address 9 Sadovaya ulitsa, Пушкин 196600, Russia
Coordinates 59°42'57.756" N 30°23'43.116" E