Although the majority of our digital images are in the public domain, there are a few collections that may be restricted to the Harvard community for reasons of copyright or donor request (all restricted images prompt the user for a Harvard ID). If you don’t have a Harvard ID, and would like to request copies of restricted images, please place a photoduplication request in the HOLLIS Special Request system. If you would like temporary online access to restricted images, please contact houghton_library@harvard.edu where the appropriate curator can review your request.