In 1407, Cord Widderich and his men from Lunden, Germany occupied Eiderstedt and made the Pellworm church tower their base for looting the surrounding villages and tricking ships into stranding.
After completing his studies he taught for a short time in the Latin school at Lunden in Dithmarschen; he was then sent by his family to Cologne to convert to Protestantism a kinsman who had become Catholic.
King Christian IV of Denmark, to whom he dedicated his Astronomia Danica, an exposition of the Tychonic system of the world, conferred upon him the canonry of Lunden in Schleswig.