AEWORLDMAP.COM (3,300+ posts)

Building: Puerta de Europa Towers
Location: Madrid, Spain
Completion: 1996
Architects: Philip Johnson, John Burgee
Structural Engineer: Leslie E. Robertson Associates
Contractor: FCC
Developer: Kuwait Investment Office

AE Interests: These post-modern, twin office buildings consist of 26 stories and have a 15° inclination, making them the first ever sloping skyscrapers. The structure has vertical, horizontal and diagonal structural steel members that surround a vertical reinforced core. The façade is composed of metal filled tinted glass panels that have a red grid-like imprint.