Not to be confused with Kingdom Tower , previously known as Mile-High Tower The Mile High Illinois , Illinois Sky-City , or simply The Illinois was a proposed skyscraper that would have been 1 mile ( 1,600 m ) high , described by Frank Lloyd Wright in his 1956 book , A Testament .
The Mile High Illinois , Illinois Sky-City , or simply The Illinois was a proposed skyscraper that would have been 1 mile ( 1,600 m ) high , said by Frank Lloyd Wright in his 1956 book , A Testament .