Castellana 77, Madrid, Office tower in Tetuán district, Madrid, Spain
Castellana 77 is an office tower in Madrid's Tetuán district standing about 68 meters tall. The structure features a glass facade with a central concrete core that houses elevators, staircases, and restrooms while providing wind protection.
The building was completed in 1973 according to architect Manuel Aymerich's designs using advanced construction techniques of its time. Energy innovations in the late 1970s shaped its development and features.
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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