 It was in the Vatican, and with the assistance of Battista, that Bartolocci received his preparation for the work that was to give him lasting fame in the world of Jewish bibliography; and it was at the Vatican and its subsidiary libraries that he obtained his chief materials.In 1675 he began in Rome the publication of "Bibliotheca Magna Rabbinica", a bibliography, in Latin and Hebrew, of Hebrew literature, arranged according to the names of the authors.This work appeared in four folio volumes, 1675–1693, three of which were published by the author and the fourth by Carlo Giuseppe Imbonati, his disciple.