The National Monuments Record (NMR) is maintained by English Heritage and represents the largest publicly accessible archive dedicated to the historic environment. The archive is based at the National Monuments Record Centre in Swindon although many databases of information are held online.

The holdings consist of data on most known archaeological sites (both terrestrial and marine), modern and historic photography, almost total coverage of England in aerial photographs, a complete set of listed buildings descriptions, survey reports on specific buildings and archaeological sites, measured drawings, and a specialist reference library.