707 17th Street

It also stood as the tallest building in the city at the time of its 1981 completion, and held that distinction for two years until it was surpassed by the 709-foot (216 m) 1801 California Street in 1983.

[4] Prior to its bankruptcy, MCI occupied the uppermost commercial floors of 707 17th Street, and served as the structure's primary tenant.

[5] However, even before MCI's acquirement, 707 17th Street stood partially vacant, and was nearing a 50% vacancy rate in 2002.

While the upper 22 floors of the building contain office space, the lowest 20 floors of 707 17th Street contain a hotel that was originally known as the Denver Marriott City Center, but was renamed the Hilton Denver City Center on December 1, 2017.

[8] The narrower region at the bottom of the building is home to the Hilton hotel, whereas the upper, wider floors contain most of the commercial space.