The La Unión y el Fénix Español building, destined to be the headquarters of the former insurance company "La Unión y el Fénix Español", was one of the first skyscrapers in Madrid.

Since 2006 it has housed the "Petit Palace Alcalá Torre" hotel, which belongs to a hi-tech company.

It was built between 1928 and 1931, based on the project of the Spanish architect Modesto López Otero,[1] with the collaboration of Miguel de los Santos.

[1] One of the keys of the project was the integration of the new skyscraper in a harmonic way with the adjacent church of Las Calatravas, both have shaped an urban entity.

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