Goar, JACQUES, Dominican and hellenist; b. at Paris, 1601; d. September 23, 1653. He entered the convent of the Annunciation in the Rue St-Honore, 1619, and made his profession there May 24, 1620. Although lector of philosophy and theology, he applied himself to the study of Greek, and was sent to the Orient by his superiors, that he might eventually render service to the Roman Church, through his knowledge of the ecclesiastical documents and the positive theology of the Greeks. He resided at Chios as missionary Apostolic and prior of the Convent of St. Sebastian (1613-39), and availed himself of his opportunities of travel to observe the various rites, to form the acquaintance of Orthodox scholars, and to study the points at issue between the Catholics and schismatics. About 1640 he returned to Rome bringing with him many manuscripts, some of which were valuable. Henceforth he was in communication with the most learned and celebrated Greeks, notably Leo Allatius, Basil Falasca, George Coresi, Pantaleon Ligardio, and others. In 1643 he returned to Paris and was made master of novices, but in November of that year went to Rome on business for the order. After his return to Paris (July 16, 1644) he devoted himself to putting in order the rich material he had brought from the East, which he had increased by visits to the libraries of France and Italy. Appointed vicar provincial in 1652, his health failed under so many labors, and he fell ill and died.
The most important work of Goar is his “Euchologion ” sive Rituale Graecorum completectens ritus et ordines divinae liturgiae” (Paris, 1667), a classic work for the study of Greek Liturgy; it is important for its original texts and for its leanred commentaries; texts and for its learned commentaries; in the second edition (Venice, 1730) a number of errors were corrected. He also edited “Georgii Cedreni, compendium historiarum” (Paris, 1647); “Georgius Codinus, curopalata, De officiis magna Ecclesiae et aulae Constantino olitanae” (Paris, 1648); “Georgii Monachi et S.P.N. Tarasii Chronographia ab Adamo usque ad Diocletianum”; “Nicephori patriarch ae Breviarium chronologicum” (Paris, 1652); “Theophanis Chronographia et Leonis grammatici Vita” (Paris, 1655). This edition of Theophanes was finished by F. Combefis. Goar also left unfinished (in manuscript) a work of the Greek canonist Blastares: “Collectio elementaris materiarum omnium sacris et divinis canonibus contentarum a Matthaeo Blastare elucubrata simul et compacta”, and a work of Sylvester Syropulos. Finally we owe to Goar the “Historia universalis Joannis Zonane ad MSS. codices recognita” (Paris, 1687); it was continued and completed by Du Cane.