Martin of Dacia (Martinus Dacus, Martinus de Dacia, Morten Mogensen, ca. 1240 - August 10, 1304) was a Danish scholar and theologian. He authored De Modi significandi (ca. 1270), an influential treatise on grammar. Biography Morten Mogensen was born at Ribe in Jutland probably in the late 1240s or early 1250s. Mogensen received his theological doctorate in Paris where he obtained the degree of a Magister artium and Magister theologiae. From the 1290s, he held a Prebendary as Canon of the Ribe Cathedral in the Ribe diocese as well as Provost of Schleswig and Canon of Lund. In Schleswig, Mogensen established a vicarage in the parish of Sywertmanrip. Mogensen was mentioned in 1288 as royal chancellor of Danish King Eric VI Menved (reign 1286 –1319). In the dispute between Jens Grand, Archbishop of Lund, and King Eric VI Menved, Mogensen arranged a royal rapprochement to Pope Boniface VIII, which in 1302 resulting in a settlement of the dispute. In 1302 he gave a donation to the chapter of Notre Dame in Paris. He founded an altar for the cathedral in Roskilde in 1303. Mogensen died during 1304 in Paris and was buried at Notre Dame. Name The rendering of his name, Morten Mogensen, into Medieval Latin as Martinus de Dacia stems from the fact that, during the Middle Ages, the toponym Dania meaning Denmark, was occasionally confused with the historic region of Dacia in the Balkans. Works Danicorum Medii Aevi De Modi significandi des Martinus de Dacia Quaestiones super Artem Veterem See also Modistae References Other sources Martini de Dacia Opera (1961) ed. Heinrich Roos in Corpus Philosophorum Danicorum Medii Aevi (Copenhagen: G. E.C. Gad) External links Oxford Index page 1240 births 1304 deaths Catholic philosophers Danish philosophers Danish Roman Catholic priests 13th-century Latin writers 13th-century philosophers