The Torre Emperador Castellana, simply known as Torre Emperador and formerly named Torre Espacio is a skyscraper in Madrid, Spain, measuring 230 metres tall and containing 57 floors. It is currently the fourth tallest building in Madrid.

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.