Philadelphia, the largest city in the U.S. state of Pennsylvania, is home to more than 300 completed high-rise buildings up to , and 56 completed skyscrapers of or taller, of which 32 are or taller and are listed below. , the tallest building in the city is the 60-story Comcast Technology Center, which topped out at in Center City on November 27, 2017 and was completed in 2018. Comcast Technology Center is the tallest building in the United States outside Manhattan and Chicago, and is currently ranked as the fourteenth-tallest building in the United States. The second-tallest building in Philadelphia is the 58-story Comcast Center at , while the third-tallest building is One Liberty Place, which rises 61 floors and . One Liberty Place stood as the tallest building in Pennsylvania for over 20 years until the completion of Comcast Center in 2008. Overall, seven of the ten tallest buildings in Pennsylvania are in Philadelphia, with the remainder being in Pittsburgh. Philadelphia is one of only five American cities with two or more completed buildings over tall, the others being New York City, Chicago, Houston, and Los Angeles.