As a service to English speaking scholars who rely on the research resources of the Vatican, The Vatican Archives project of the University of Michigan over a period of 20 years (1984-2004) has worked to integrate in a single information structure basic series level information on the holdings not only of the Archivo Segreto Vaticano, but also the holdings of the archives of the Propaganda Fide, the Fabbrica di San Pietro, the Archivio de Stato di Roma (Papal States period), the Congregation for the Doctrine of the Faith. The project also consulted other repositories such as Trinity College (Dublin) and the Archives Nationales (Paris) that for historical reasons have important Vatican archival material.
The principal result of the project was, Vatican Archives, An Inventory and Guide to Historical Documents of the Holy See by Blouin, Coombs, Claudia Carlen, Elizabeth Yakel, and Katherine Gill, published by Oxford University Press in 1998. As well, approximately 1500 series description records were entered into RLIN, the bibliographic database of the Research Libraries Group.