You are very welcome to visit us from Monday till Friday. Due to the current measures, a limited number of 150 customers can be admitted at the same time. We furthermore request you to follow the general guidelines as set out by the RIVM. See also our visiting information and our current opening hours. Online services Check out our online services such as Delpher, DBNL and the KB-catalogue. Questions? Please feel free to contact us via our contact page, Facebook, or Twitter if you have any questions.