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Cuatro Torres Business Area (CTBA) is a business park near the Paseo de la Castellana, Madrid (Spain), on the grounds of the former Ciudad Deportiva of Real Madrid. Initially known as Madrid Arena, the consortium of the four towers owners decided to adopt a new corporate image for the set and the name Cuatro Torres Business Area. This business park consists of cuatrorascacielos which are the tallest buildings in Madrid and Spain. The four buildings are the Torre Caja Madrid, the Torre Sacyr Vallehermoso, the Torre de Cristal and Torre Espacio. The first is the highest in Madrid and Spain with its 250 meters high.
The skyscrapers are home offices. However Sacyr Vallehermoso Tower also houses a hotel and on top of the Torre de Cristal is a garden. Each tower has several floors of parking underground, and also underground, road access to the business park to avoid traffic crashes on the surface. The construction of four buildings began in 2004 and in late 2007 and early 2008 were completed. Along with the four towers and within the precincts of the business park will house the International Convention Centre in Madrid, a conference building with 70,000 m² and a main auditorium with capacity for 3,500 people. The design of this building has been assigned to Emilio Tuñón and Luis Moreno Mansilla after the final decision of the jury concluded on April 26, 2007.