The subject of the tallest building in the world has always been ripe with architectural controversy. From the last minute spire of the Chrysler Building to the “vanity height” used to game the system. There’s an organization, Council on Tall Buildings and Urban Habitat (CTBUH), that comments and ranks buildings but the Skyscraper Museum has come out with its own list which include buildings that have topped out but may not yet be open. The CTBUH waits for a building to be officially open.