ArchitectBruce GrahamPeruvian-American architect (1925–2010), 1925–2010Photograph of one of their buildings · JeremyA · CC BY-SA 2.5 · Wikimedia Commons2 buildingsColombiaFurther readingWikipedia article↗Buildings875 North Michigan AvenueChicago, United StatesWillis TowerChicago, United States