BURJ KHALIFADubai, United Arab Emirates

Architect: Adrian SmithHeight: 828 MFloors: 163Function: Mixed-use

WILLIS (SEARS) TOWERChicago, United States

Architect: Fazlur Rahman KhanHeight: 442 M, 527 M to tipFloors: 110Materials: Steel

1965197419912009

CARNEGIE HALL TOWERNew York, United States

Architect: Caesar PelliHeight: 231 MFloors: 60Function: Office building

JOHN HANCOCK CENTERChicago, United States

Architect: Fazlur Rahman KhanHeight: 344 M, 459 M to tipArea: 4.062 M2Floors: 100