Tiananmen Square or Tian'anmen Square (/ˈtjɛnənmən/) is a city square in the city center of Beijing, China, named after the Tiananmen ("Gate of Heavenly Peace") located to its north, which separates it from the Forbidden City imperial palace complex. The square holds the Monument to the People's Heroes, the Great Hall of the People, the National Museum of China, and the Mausoleum of Mao Zedong. They were inscribed in the UNESCO World Heritage Sites in 2024 as a part of the Beijing Central Axis.
Chairman 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. The size of Tiananmen Square is 765 × 282 meters (215,730 m or 53.31 acres). It has great cultural significance as it was the site of several important events in Chinese history.