Castro y Bellvís, Guillén de (gēlyānˈ dā käsˈtrō ē bĕlvēsˈ) [key], 1569–1631, Spanish dramatist, best known of the Valencian group of playwrights of the Golden Age. Three of his plays dramatize episodes from Don Quixote. His masterpiece, Las mocedades del Cid [the youthful adventures of the Cid], is a historical drama that furnished Corneille with the material for his play Le Cid. Castro enjoyed considerable success during his lifetime.
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