The capital city known for its historical significance in the foundation of modern democracy is Washington, D.C. in the United States. Established as the capital in 1800, it houses significant political institutions, including the White House and the Capitol Building. Washington, D.C. is also home to numerous memorials and monuments that commemorate pivotal events in American history, showcasing the ideals of democracy and governance. The city hosts international diplomacy and is a symbol of democratic values and freedom for many around the world.