Palau Baró de Quadras
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Palau Baró de Quadras Avinguda Diagonal 373, 08008 Barcelona

The Palau Baró de Quadras, built between 1904 and 1906 by the architect Puig i Cadafalch, is a modernist mansion house located halfway between La Pedrera and La Casa de les Punxes. It has been cataloged as an Artistic Historic Monument of National Interest since 1976 and now houses the Institut Ramon Llull.
The Palau will be open to the public every Wednesday from 11:00 to 13:00, with specialized guided tours in three languages (Catalan, Spanish and English). During the tour, you will visit the main hall, two facades, the terraced roof and the main floor.
HOW TO GET THERE
- L3/L5-Diagonal
- 6, 33, 34, 39, H8, V17
- Pg. de Gràcia-La Pedrera
- L6/L7-Provença
More info here