Bibliotheca hagiographica latina

Bibliotheca hagiographica latina (usually abbreviated to BHL) refers to the standard catalogue of Late Antique and medieval hagiography written in Latin. It was compiled by the Bollandist Society and published in a series of publications:

The main catalogue:

Société des Bollandistes, Bibliotheca hagiographica latina antiquae et mediae aetatis, 2 vols, Subsidia Hagiographica 6, Brussels: Société des Bollandistes, 1898–1901.
Gallica – vol. 1 (A-I): <link> Gallica – vol. 2 (K-Z): <link> Internet Archive – vol. 2 (K-Z): <link>

Two supplements:

Société des Bollandistes, Bibliotheca hagiographica latina antiquae et mediae aetatis: supplementi editio altera auctior, Subsidia Hagiographica 12, Brussels: Société des Bollandistes, 1911.
Fros, Henryk, Bibliotheca hagiographica latina antiquae et mediae aetatis: novum supplementum, Subsidia Hagiographica 70, Brussels: Société des Bollandistes, 1986.

Texts not included in the catalogue:

Fros, Henryk, “Inédits non recensés dans la BHL”, Analecta Bollandiana 102 (1984): 163–196, 355–380.

A searchable catalogue of texts indexed by BHL number:

Société des Bollandistes, Michel Trigalet, François De Vriendt, Paul Bertrand, Bénédicte Legrain, Guy Philippart, Robert Godding, Xavier Lequeux, and Jean-Marie Delanghe, BHLms: Index analytique des Catalogues de manuscrits hagiographiques latins publiés par les Bollandistes, Online: Louvain University, 1998. URL: <http://bhlms.fltr.ucl.ac.be>. 
comments: Three members of the Bollandist society, Robert Godding, Xavier Lequeux and Jean-Marie Delanghe, are listed as having been responsible for augmenting and revising the index.