Robert Crowley also Croleus (born c. 1517, died 1588) was a London stationer , poet, polemicist and Protestant clergyman who produced the first printed editions of Piers Plowman and the first complete metrical psalter in English. Crowley also led the nonconformist faction in the Elizabethan vestiarian crisis or vestments controversy, which he precipitated. During this dispute he produced what has been called "the first Puritan manifesto."