Passage: Rasmus Bartholin (; Latinized: Erasmus Bartholinus; 13 August 1625 – 4 November 1698) was a Danish scientist, physician and grammarian. As part of his studies, he travelled in Europe for ten years. Professor at the University of Copenhagen, first in Geometry, later in Medicine. He was a younger brother of Thomas Bartholin. He wrote, in Latin, the first grammar of the Danish language, the 1657 De studio lingvæ danicæ.

Question: Rasmus Bartholin had a career as what?
Professor at the University of Copenhagen, first in Geometry, later in Medicine