George de Ghewiet's reports on cases decided by the Sovereign Court (Parlement) of Flanders in the Kingdom of France was primarily based on the reports written by Jacques Pollet, a judge in the same court, which were published in 1716. In his own work, de Ghewiet, an advocate, added new decisions, both of the Parlement of Flanders and of other courts in France and in the Low Countries, and included commentaries referring extensively to European legal literature. Like many other reports of the French Parlement of Flanders (all, however, written by judges), de Ghewiet's reports were never printed, although the author had intended to have the work published. A modern critical edition has been prepared by the authors of the present article. In this contribution, they discuss de Ghewiet's Jurisprudence du Parlement de Flandre in comparison with other reports of the French Parlement, the author's purpose and the structure of the work, and also his use of a wide range of legal authorities.