Tiananmen Square is a city square in the centre of Beijing, China, named after the Tiananmen ("Gate of Heavenly Peace") located to its north, separating it from the Forbidden City. 

The square contains the Monument to the People's Heroes, the Great Hall of the People, the National Museum of China, and the Mausoleum of Mao Zedong. 

Mao Zedong proclaimed the founding of the People's Republic of China in the square on October 1, 1949; the anniversary of this event is still observed there. Tiananmen Square is within the top ten largest city squares in the world (440,500 m2 – 880×500 m).  It has great cultural significance as it was the site of several important events in Chinese history.

Outside China, the square is best known for the Tiananmen Square protests of 1989, an armed suppression of a pro-democracy movement in June 1989 by the Chinese government.