Palau del Baró de Quadras
Dreta de l'Eixample, Spain
The Palau Baró de Quadras is a small modernista palace located in Barcelona on Avinguda Diagonal, equidistant from La Pedrera and Casa de les Punxes. It was built by the Catalan architect Josep Puig i Cadafalch between 1904 and 1906. In 1976 it was designated as Nacional National Historical Monument of Artistic Interest. Currently houses the main offices of the Institut Ramon Llull.
Palace data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).