List of tallest buildings
The international non-profit organization Council on Tall Buildings and Urban Habitat (CTBUH) was formed in 1969 and announces the title of "The World's Tallest Building" and sets the standards by which buildings are measured. It maintains a list of the 100 tallest completed buildings in the world. The organization currently ranks Burj Khalifa in Dubai as the tallest at . The CTBUH only recognizes buildings that are complete however, and some buildings included within the lists in this article are not considered finished by the CTBUH.
List of tallest buildings in Washington, D.C.
This list of tallest buildings in Washington, D.C. ranks high-rises in the U.S. capital city of Washington, D.C. The tallest structure in the city, excluding radio towers, is the Washington Monument, which rises and was completed in 1884. The structure, however, is not generally considered a high-rise building as it does not have successive floors that can be occupied. The tallest habitable building in the city is the Basilica of the National Shrine of the Immaculate Conception, which rises . The second-tallest building in Washington is the Old Post Office Building, which is high. The third-tallest building in the city is the Washington National Cathedral, which rises above grade. The cathedral is built on high ground known as Mount St. Alban, above sea level, which makes the central tower the "highest" point in the District. As of November 2011, there are 410 completed high-rises in the city.