Los trabajos de Persiles y Sigismunda ("The Travails of Persiles and Sigismunda") is a romance or Byzantine novel by Miguel de Cervantes Saavedra, his last work and one that stands in opposition to the more famous novel Don Quixote by its embrace of the fantastic rather than the commonplace. While Cervantes is known primarily for Don Quixote, widely regarded as one of the foremost classic novels of all time, he himself believed the Persiles, as it is commonly called, to be his crowning achievement. He completed it only three days before his death, and it was posthumously published in 1617.