Chicago, the third-largest city in the United States, is home to 1,384 completed high-rises, 53 of which stand taller than . The tallest building in the city is the 110-story Willis Tower (formerly the Sears Tower), which rises in the Chicago Loop and was completed in 1974. Sears Tower was the tallest building in the world upon its completion, and remained the tallest building in the United States until May 10, 2013. The second, third, and fourth-tallest buildings in Chicago are the Trump International Hotel & Tower, St Regis Chicago, and the Aon Center, respectively. Of the ten tallest buildings in the United States, two are located in Chicago. Chicago leads the nation in the twenty tallest women-designed towers in the world, thanks to contributions by Jeanne Gang and Natalie de Blois. , Chicago had 116 buildings at least tall.