Claudio Castelucho y Diana (1870–1927) was a Catalan painter, sculptor, and teacher who established much of his career in Paris. Born in Barcelona, he showed an early aptitude for art and began exhibiting while still a young man. His work was accepted at the Paris Salon in 1897, marking an important step in his development within the French art world. Castelucho became particularly known for paintings of Spanish figures and subjects, drawing repeatedly on the visual culture of his native country. These works allowed him to combine his Spanish background with the artistic language he encountered in Paris, where he spent much of his professional life. Teaching also formed an important part of his career. In 1905, Castelucho joined the faculty of the Académie de la Grande Chaumière, established by Alice Dannenberg and Martha Stettler as an alternative to the more formal teaching methods of the École des Beaux-Arts. The academy encouraged a freer approach to artistic training, placing greater emphasis on individual development and direct study from the model. It later attracted an international community of artists, including Louise Bourgeois, Alexander Calder, Isamu Noguchi, and Alberto Giacometti. Castelucho’s association with the Académie de la Grande Chaumière places him within an important moment in the development of modern art education in Paris. His career brought together traditional training, portraiture, and teaching at a time when younger artists were increasingly moving beyond established academic conventions.