The John Hancock Tower, officially known as the John Hancock Center, is a prominent skyscraper located in Chicago, Illinois. Completed in 1969, it stands at 1,128 feet tall and features 100 floors, making it one of the tallest buildings in the United States. The tower is known for its distinctive dark glass façade and unique X-bracing design, which enhances its structural stability. The John Hancock Tower houses office spaces, retail shops, and residential units. It also features an observation deck on the 94th floor, offering stunning views of the Chicago skyline and Lake Michigan. The building is a key part of the city's architectural landscape and a popular tourist destination.