Telefónica Building - Credit: Wikimedia Commons
The Telefónica Building, in Spanish Edificio Telefónica, is a skyscraper in Madrid, Spain. It is located in Gran Via 28.García Algarra, Javier (2012). "De Gran Vía al Distrito C. El patrimonio arquitectónico de Telefónica". Doctoral dissertation, UNED, 2012. (In Spanish) At the time of construction it was the tallest European skyscraper with 89 m of roof height, until in 1940, when the Terrazza Martini Tower opened in Genoa. Read more on Wikipedia
Source: en.wikipedia.org