A database offering complete coverage of Church prelates, information on all 1300 medieval bishoprics, archdioceses and patriarchates and prosopographical information on 18,507 bishops, archbishops and patriarchs. Its main sources are: C. Eubel, Hierarchia catholica medii aevi... ab anno 1198 [1st and 2nd edns. Münster, 1898ff] and P.B. Gams, Series episcoporum ecclesiae catholicae [Regensburg, 1873-86]
