The Middle Ages span a period of well over a millennium: from the emperor Constantine's Christian conversion in 312 to the early sixteenth century. David Luscombe's clear and accessible history of medieval thought steers a clear path through this long period, beginning with the three greatest influences on medieval philosophy: Augustine, Boethius, and Pseudo-Denis, and focusing on Abelard, Anselm, Aquinas, Ockham, Duns Scotus, and Eckhart among others in the twelfth to fifteenth centuries.