707 17th Street, Denver

707 17th Street, currently known as the Jacobs Building, is a prominent skyscraper located in Denver. Completed in 1981, this mixed-use building rises 42 floors and reaches a height of 522 feet (159 meters). At the time of its completion, it was the tallest building in Denver, holding that title until 1983 when it was surpassed by 1801 California Street.

The building is notable for its distinctive architectural design, which features a "setfront" rather than the more common "setback" design seen in many skyscrapers. The structure bulges outward and becomes wider at its 21st floor, where the office space begins, while the narrower lower floors house a hotel. The façade is composed of black glass, showcasing an international-style "black box" architectural approach.

The first 20 floors of the building were originally home to the Denver Marriott City Center, which was rebranded as the Hilton Denver City Center on December 1, 2017. The hotel occupies these floors and offers 613 guest rooms and suites. The remaining upper floors are dedicated to office space, making the building a mixed-use skyscraper that combines commercial and hospitality functions.