In the center of the city, it is 800 meters from north to south and 500 meters from east to west. The square occupies 40 hectares and is one of the largest in the world. Towering over the square in the center is the Monument to the largest in the world. The Tiananmen Gate is in the north, and Chairmen Mao’s Memorial Hall, solemn and serene, in the south. On the western side is the Great Hall of the People, and on the eastern side, the Museum of Chinese history and the Museum of the Chinese Revolution. On every May 1 and October 1 big portraits are displayed. They are, from left to right, Marx, Engels, Lenin, and Stalin. Also prominent is Dr. Sun Yat-sen. The founding ceremony for the people’s Republic of china was held on this square in 1949.