An early and highly desirable 17th-century folio printing of Summa Theologica by Saint Thomas Aquinas, published in Lutetiae Parisiorum (Paris) by the renowned Billaine in 1645 in its original 17th-century binding. This monumental theological work remains one of the cornerstones of Christian philosophy and Catholic doctrine, here presented in a large and imposing folio format. Details: Author: Thomas Aquinas (S. Thomae Aquinatis) Title: Summa Theologica Publisher: Joannis Billaine, Paris Year: 1645 Language: Latin Format: Folio (355 × 240 mm) Pagination: (16) + 272; (8) + 273; (18) + 670; (4) + 204; (162) pp. Weight: ~4.8 kg Binding & Condition: Binding: Contemporary limp vellum with yapp edges Spine: Four raised bands, with woodcut title “Summa Theologica S. Thomae” in manuscript to spine Condition: Very Good minus overall Signs of aging and wear to vellum, including a small tear at front panel edge Neat ex-libris inscription + neat marginalia Spine cords somewhat visible but binding remains relatively tight and secure Water staining towards the last few pages, with one leaf showing a closed tear near the top. Very small wormholes (0.5-2cm) on leaf margins that does not affect text Text block remains generally clean and solid, an impressive survival for a 17th-century folio Notes: This edition presents the Summa in one single massive folio volume, rather than multiple volumes (tomes), making it an important and scarce issue. Contains the three great Parts of the Summa, along with indices and editorials from leading theologians of Louvain and Douai. A monumental work of Scholasticism, indispensable for collections of theology, philosophy, or early printing. A rare opportunity to acquire a substantial 17th-century folio of Thomas Aquinas’s Summa Theologica — a landmark of Catholic doctrine and one of the most influential works in Western thought.