Claudio Castelucho y Diana (5 July 1870, Barcelona – 31 October 1927, Paris) was a Spanish sculptor, painter, and art instructor from Catalonia who established his career in France. Demonstrating precocious talent, Claudio began exhibiting publicly while still in his twenties. His work gained acceptance at the Paris Salon of 1897, marking his official debut in the French art world. He became known particularly for his depictions of Spanish figures—a subject he pursued throughout his career, drawing upon his cultural heritage as enduring thematic material. In 1905, Claudio joined the inaugural faculty of the Académie de la Grande Chaumière, founded by Alice Dannenberg and Martha Stettler as an alternative to the rigid pedagogical methods of the École des Beaux-Arts. Their vision in which supported by the instructional contributions of Claudio and fellow teachers sought to foster artistic experimentation and individual expression rather than adherence to academic convention. This educational philosophy proved remarkably successful: the Académie became an incubator for numerous twentieth-century masters, including Louise Bourgeois, Alexander Calder, Isamu Noguchi, and Alberto Giacometti, each of whom would profoundly shape the international art landscape. Claudio's role in this progressive institution positioned him at the nexus of traditional craft and modernist innovation during a pivotal moment in art history.