[INCUNABLE]. GRÉGOIRE IX. DECRETALES: cum summariis suis et textuum divisionibus: ac etiam rubricarum continuationibus. Venetiis per Baptistam de Tortis, MCCCCC. Die IX. Aprilis [Venice, Baptistam de Tortis, April 9, 1500]. In-folio havana calf on wooden boards, boards decorated with cold framing of fillets and crossed fillets forming lozenges in the center of which are floral motifs, brass clasps, ribbed spine (Binding of the period); (4) ff., 303 ff. Defects: missing headpieces, spine leather largely missing, epidermis and small leather chips on boards, clasps and fasteners largely missing, wormholes leading to loss of words and letters, most marked on ff. 69 to 87 and ff. 203 to 219. INCUNABLE EDITION OF THE DECRETALES OF GRÉGOIRE IX, an official compilation of CANONIC LAW texts promulgated with the bull Rex pacificus of September 5, 1234, by Pope Gregory IX to complete the Decree of Gratian. Promulgated between the Third Lateran Council and 1234, the Decretals, also known as the Liber Extra, were compiled by the Dominican canonist Raymond de Penyafort at the behest of Pope Gregory IX, and form part of the Corpus juris canonici. BEAUTIFUL PRINT in red and black on strong laid paper, 2 columns of 82 lines, with the gloss surrounding the text and the printer's mark in red on the last page. A VERY PRETTY EXEMPLAIR in folio format, complete with all leaves and preserved in its original binding. From the LIBRARY OF Georg KLOSS (1787-1854), with his bookplate "Georgius Kloß, M.D. Francfurti ad Moenum", a physicist born in Frankfurt am Main and collector of manuscripts and incunabula, whose collection was sold at Sotheby's in 1835. He was a specialist in Freemasonry and Masonic bibliography. ¶ Hain, 8039 - Polain, 1739 - USTC, n°800034, for an edition of 1504.