Miguel de Unamuno was a Spanish writer and philosopher born on September 29, 1864, in Bilbao, Spain. He is best known for his contributions to the literary and philosophical movements of the Generation of '98, which sought to address Spain's social and political issues. Unamuno's works often explore themes of existentialism, identity, and the struggle between faith and reason. Unamuno served as the rector of the University of Salamanca and was an influential figure in Spanish literature. His notable works include the novel Niebla (Mist) and the essay collection Del sentimiento trágico de la vida (The Tragic Sense of Life). He passed away on December 31, 1936.