Digital resources are important tools for research in the Humanities, nowadays. The Max Planck Institute for Legal History and Legal Theory recognised this development already at an early stage and became an active player by offering sources relevant for legal history, which resulted from a series of digitisation projects. Printed material is converted into digital form and enriched with extensive metadata to improve its accessibility. The goal of these efforts is to provide researchers – both, within the institute and outside of it - with stable long term access to these materials, which can be examined at any time and any place of the globe on the internet. The digital library of the institute connects the results of several digitisation projects. It is conceived as an offering closely oriented on the needs of the research community and strictly following Open Access principles.