What is a famous building that was built in the 1940s?

One famous building constructed in the 1940s is the United Nations Headquarters in New York City. Designed by a team of architects including Le Corbusier and Oscar Niemeyer, the complex was officially opened in 1945. Its modernist style and iconic General Assembly Hall symbolize international cooperation and diplomacy. The headquarters is a designated UNESCO World Heritage site and remains a pivotal center for global governance.