The Museum Boerhaave in Leiden is a museum devoted to the history of science and medicine. The museum was founded in 1928 as part of an effort by two local scientists – the physicist Claude August Crommelin, and a zoologist called Cornelis Jakob van der Klaauw. They hoped that the museum could preserve the large collection of historically significant scentific instruments that were gathering dust in various corners of the Leiden University. One of the most interesting collections is a set of telescope lenses used by Christiaan and Constantijn Huygens.