(Basel: Michael Wenssler), January 4, 1485. Part two only (of five parts). Folio. 321 (of 322) leaves; lacking a1. In 56 lines and headline; in double column. Large ornate opening penwork initial in blue and red on a2, with additional ornate penwork initial on a5; capital letters and capital strokes in red. 20th century full calf; dampstaining throughout; tissue repairs affecting inner column letters on preliminary ten leaves; very minor marginal worming to preliminary leaves; toning; some soiling. BMC III, 728; Goff A-874; GW 2188; HC 1245; ISTC ia00874000

The Summa Theologica was completed shortly before Saint Antoninus's death in 1459, and was first printed in 1477. Drawing heavily upon the earlier writings of Thomas Aquinas, it was divided into four parts: the first dealing with the soul, the second with sin, the third with work, and the fourth with the cardinal virtues and gifts of the Holy Spirit. These writings are considered to be foundational texts in the realm of moral philosophy.