Below is a carefully selected list of the web sites which give reasonable information on the medieval fortifications of England and Wales. As with so much on the internet there is a vast variation in quality. Castle studies has had major and significant findings and reinterpretations in the last couple of decades which has made major changes in the understanding of castle. This is very rarely reflected in online sources.
Many 'castle' sites are appallingly poor, rehashing old and unsound ideas and myths. Some sites have limited, often dated, but useful content. A few have broad and good content. A tiny handful have, in-depth, quality written content and illustrations that show important details and which reflect the most up to date ideas about castles. One of the purposes of this list is save the reader the trial of viewing the poor sites and to give critical information on the worthwhile sites. Sites in bold are particularly noteworthy.
Specific links to individual castles and fortifications, where these exist, can be found on the individual web page but the web is a highly dynamic environment and Gatehouse does not waste much effort in checking links so some links will be dead and a search with an internet search engine may well be worthwhile.
Anyone who wishes to let Gatehouse know about a web site that they considered worth adding to this list is welcome to contact Gatehouse. However, please note this is a non-commercial site and the good will of the copyright holders of the information on this site comes from this being a non-profit educational resource. No link will be made to a commercial site unless it provides significant free and useful content.
Gatehouse is not responsible for the content of external websites.
British
History Online is the digital library containing some of the core printed
primary and secondary sources for the medieval and modern history of the
British Isles. Created by the Institute of Historical Research and the
History of Parliament Trust, it aims to support academic and personal users
around the world in their learning, teaching and research. With so much
material now being published on the world wide web in either un-reviewed
form, or in fee-based services, the IHR has shown its commitment to promoting
the study of history by publishing these priceless resources for their
historical value, cross-searchable, in one place and free of charge. Now
has a good amount of the various Victoria County Histories available and
they will eventually publish the charter and patent rolls (although some
of this content may be restricted and require payment to access). 
