The Puerta de Europa towers (Gate of Europe or just Torres KIO) are two twin office buildings in Madrid.
They were commissioned in 1996 by the Kuwait Investment Office (hence their initial name "Torres KIO" or "KIO Towers"). Each building is 115 m tall with an inclination of 15°. They are located near the Chamartín railway station, on the sides of the Plaza Castilla bus station, north from the Paseo de la Castellana and near the Cuatro Torres Business Area.
After the Torres KIO fraud case, KIO had to sell the buildings, which are now owned by Caja Madrid and Realia.
Architects : Philip Johnson and John Burgee