The Reina-Valera 1960 has its roots in the 16th-century translation of the Bible by Casiodoro de Reina and Cipriano de Valera, two Spanish Protestants who sought to make the Scriptures accessible to the Spanish-speaking world. Their translation, known as the Reina-Valera, was first published in 1569 and became a classic of Spanish literature. Over the centuries, various revisions and updates were made to the Reina-Valera, but it wasn't until 1960 that a major revision was undertaken.