The seminar will take you behind the scenes of the public website to see how this database evolved from the factoid prosopography model created for the ‘Prosopography of Anglo-Saxon England’ (PASE) by John Bradley of the Centre for Computing in the Humanities, now Department of Digital Humanities, at Kings College London. PoMS has developed what might be called a ‘transactional model’ of factoid prosopography, due to the fact that it is comprised almost entirely of transactional documents like charters. Rather than simply recording events, the transactional model is explicitly interested in relations between individuals as recorded in the documents. We will examine the new structures PoMS incorporates to allow end users the ability to research the terms of the transaction, and thus the nature of the interaction between people, as well as multiple transactions happening at different times within the same document. We will look at the work of Michele Pasin, formerly of DDH, in developing new ways for users to both search and visualise these transactions. The seminar will finish with a consideration of the capabilities of the database for studying the social networks, and visualising the relationships between large numbers of people.