The modernist mansion where spies once hid

In 1916, [Gran Hotel de Cartagena](http://example.com/building/gran-hotel-de-cartagena) was built by architect Víctor Beltrí as a commission from Celestino Martínez Vidal. The construction of the hotel was delayed after Martínez Vidal's death in 1911. During World War I, the hotel hosted Wilhelm Canaris, a German spy. In the Spanish Civil War, the Gran Hotel de Cartagena was expropriated and used as the headquarters of the Juventudes Socialistas Unificadas and the Milicias. The hotel’s grand staircase and its railing are original and can still be admired today. In 2012, the College of Architects of Valencia and Murcia opposed the possible demolition of the hotel, and in 2016, it was declared a monument of cultural interest. Today, the hotel is a remodeled office building, with the original structure of steel laminate and the main staircase remaining unchanged.

Sources: Wikipedia, OpenStreetMap, Wikidata, Wikimedia Commons