Erlend de Groot finished his thesis on Laurens van der Hem and his Atlas in 2001. His dissertation was awarded with 2 prices: a Praemium Studiorum by the Foundation Praemium Erasmianum (2001) for excellent dissertations in the field of the humaniora; and the Karel van Mander prize (2002) for the best study in the history of art, 1999-2002. Erlend de Groot is also one of the compilers of the Descriptive Catalogue of the Atlas Blaeu van der Hem in 6 volumes (1996-2006).