Castellana 77, Madrid, Office tower in Tetuán district, Madrid, Spain
Castellana 77 is an 18-storey, 68-metre office tower at Paseo de la Castellana 77, in the AZCA superblock of Cuatro Caminos, Tetuán. Its fully glazed facade is fitted with movable slats that shade the interior and light up at night. A central concrete core, raised with sliding formwork, holds stairs, lifts and toilets and braces the structure.
Castellana 77 was built between 1973 and 1977 to designs by architect Manuel Aymerich Amadiós and inaugurated in 1978, at a cost of 950 million pesetas excluding the land. Its central concrete core, raised with sliding formwork, holds stairs, lifts and toilets and also braces the structure. It was the head office of Saint-Gobain Cristalería in Spain, and BBVA bought it in 2003 for 87.5 million euros.
The tower marks Madrid's shift toward modern office architecture during the 1970s. It shows how the city embraced functional design for business purposes during that era.
The building sits near Cuatro Caminos and underwent significant renovation work in 2017 with modern upgrades. Solar protection slats were installed during the work to improve energy performance and environmental comfort.
The building pioneered the integration of solar energy into its structure in Spain. With solar panels and innovative energy systems installed in the late 1970s, it demonstrated early pathways to sustainable building development.
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