Marcus Jordanus

Jordanus studied at the University of Copenhagen, where in 1550 he was appointed Professor of Mathematics.

Among other things, he gave lectures on geodesy and dealt with the geography of Ptolemy.

This was one of the first printed maps of the Duchies of Schleswig and Holstein, and Abraham Ortelius referred to it in his Catalogus Cartographorum.

In 1553, Cristian III of Denmark and Norway commissioned Jordanus to visit and map all the provinces of the empire.

After this commission, the cartographer did not return to the University, but devoted his time to further mapping work.