330 North Wabash

AMA Plaza (formerly IBM Plaza or IBM Building; also known by its address 330 North Wabash Avenue) is a skyscraper in the River North neighborhood of Chicago, Illinois, United States. It was designed in the International Style by Ludwig Mies van der Rohe, with C. F. Murphy as the associate architect, and was the last building Mies designed in Chicago before his death in 1969. The tower is 695 feet (212 m) tall with 52 stories and, when completed in 1972, initially housed the Chicago offices of the technology firm IBM. Since 2013, the 2nd through 13th stories have functioned as a hotel called the Langham, Chicago, while the remaining stories continue to be used as offices. The building is listed on the National Register of Historic Places and is designated as a Chicago Landmark. IBM officials first contacted Mies to design the building in 1966, and the company officially announced plans for the building in June 1968. Work began in February 1969, and the building was formally dedicated on September 20, 1972. After the last vacant offices were leased in 1975, the building remained fully occupied for two decades. IBM downsized its offices in the mid-1990s and sold it in 1996 to the Blackstone Group, which resold it in 1999 to Prime Group Realty. The building's two largest tenants, IBM and Jenner & Block, announced plans to move out during the mid-2000s, and the 2nd through 13th stor

Building data from Wikidata (CC0); heights normalised. Summary from Wikipedia (CC BY-SA).