This thesis is an attempt to examine Christopher Marlowe's Tragical History of Dr. Faustus from the point of view of Elizabethan popular theology. The first chapter deals with the problem of knowledge, the second, with witchcraft, and the third, with the question of sin and damnation. Each of these three topics, discussed frenquently in Elizabethan theological treatises intended for popular use, represents a significant element in the play. The approach has been to ascertain what ideas found in Elizabethan popular theology are expressed in Dr. Faustus, and to suggest what these ideas indicate about possible meanings of passages involved.