"Don Álvaro o la fuerza del sino" is a play written by Ángel de Saavedra, the Duke of Rivas, first published in 1835. It is a romantic drama that explores themes of fate, love, and honor. The story follows the tragic love between Don Álvaro and Leonor, which is thwarted by family feuds and societal expectations. The play is notable for its complex characters and emotional depth, reflecting the struggles of individuals against their destinies. It is considered a significant work in Spanish literature and a precursor to the Romanticism movement, influencing later writers and playwrights.