Mart van Duijn
Dr. J.M. van Duijn is Curator of Western Manuscripts (post medieval) and Archives at Leiden UniversityProfile page
Collector Bodel Nijenhuis is best known for his collection of maps and atlases, but he also collected portraits and autographs. Through his collections he created a documentation system on famous people, with portraits, specimens of their handwriting and biographical information.
Leiden University has a long history in studying space, which is reflected in the collections held at Leiden University Libraries. An inventory of the university's obervatory gives insight in the tools and supplies needed for discovering space in 1798.