The Cuatro Torres Business Area (CTBA), also known as the Área de Negocios de las Cuatro Torres, is a business district located in the Paseo de la Castellana in Madrid, Spain, on the former Ciudad Deportiva of Real Madrid. The area contains the four tallest skyscrapers in Spain, and four of the ten tallest in the European Union: the Torre Emperador, Torre de Cristal, Torre PwC and Torre Cepsa. Construction of the buildings finished in 2008.

Paseo de la Castellana, commonly known as La Castellana, is a major thoroughfare in Madrid, Spain. Cutting across the city from south to north, it has been described as the "true structuring axis" of the city.