In 1204 King Philip Augustus of France conquered Normandy, thus breaking up the ‘Anglo-Norman realm’ created after the Norman conquest of England in 1066. The severing of connections between the two countries had profound implications for French and English identity and politics, but it has not received the detailed study that it merits. The Lands of the Normans project is based on the study of a sample of Anglo-Norman landowners, based on the single most important English source for the confiscations of 1204, the Rotulus de valore terrarum Normannorum. The project team traced the history of each of the lay families and estates that appear in this source through the surviving records, English and French, royal and private, before and after 1204. These records were entered into an online database, designed and created by the historical members of the project team in combination with the technical officers at the Humanities Research Institute. “The database contains details of over 2,000 individual documents collected from over 100 historical sources. Nearly 3,000 different people and places appear in the database, and there are over 13,500 links describing the relationships between these people and places. The Lands of the Normans database thus provides an introduction to a number of important Anglo-Norman families, including their appearances in royal and private records and access to automated reconstructions of the genealogies of each family and maps of landholding. We hope that this may encourage other historians to explore the potential benefits of Information Technology for their own research.