The Bibliographic Information Base in Patristics is a documentary system in patristics. Even if patristic literature remains its major preoccupation, the BIBP works on all disciplines studying patristic Christianity. The database may be browsed in the own language of each document with the fields "All fields" or "Descriptors in original language". However, for a single search on the entire database (all languages), you have to use French keywords with the fields "Descripteurs... via le français". A first search in your own language will allow you to find and copy/paste the relevant French keywords.