[1] [2] Morten Mogensen was born at Ribe in Jutland probably in the late 1240s or early 1250s.
In Schleswig, Mogensen established a vicarage in the parish of Sywertmanrip.
[3] 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.
[4] [5][6][7] The rendering of his name, Morten Mogensen, into Medieval Latin as Martinus de Dacia stems from the fact that, during the Middle Ages, Dacia was the name of the ecclesiastical province covering the entire Nordic region.