The neo-Pompeiian Museu Martorell, designed by Antoni Rovira i Trias, opened in 1882 as the city's very first public first museum, the Museu Martorell, dedicated to geology.
It has recently been subject to a €5m plus renovation to become (by the end of 2023 or so they say) the venue for temporary exhibits of the Museu de Ciències Naturals.
Image by Townie