During the Communist rule of Bulgaria, the square was named September 9th Square, after a coup on September 9, 1944, made the country a Communist state. Before 1944, the square was known as Tsar's Square because the former royal palace, now the National Art Gallery was located there.
During Bulgaria's communist rule, the square was renamed September 9th Square after a coup on September 9, 1944, which established a Communist government. Prior to this event, the square was known as Tsar's Square because the former royal palace, now the National Art Gallery, stood there.