The origin of the current museum is in the first Fine Arts Museum, founded in 1908 and opened in 1914 and the Modern Art Museum opened in 1924. Both institutions and their collections were united in 1945, the year that the old building was constructed.
The collection of the Fine Arts Museum, which opened in 1914, brings together over seven thousand works of art, including paintings, sculptures, works on paper and applied arts, with an outstanding heritage spanning from the twelfth century to the present. It contains important examples of ancient, modern and contemporary painting and has a special interest in the Spanish school of art and in Basque artists, by whom it has a large collection of works.
https://www.bilbaoturismo.net/BilbaoTurismo/en/other-museums/museum-of-fine-arts