The Acta Sanctorum is a collection of documents examining the lives of saints, organised according to each saint's feast day, and runs from the two January volumes published in 1643 to the Propylaeum to December published in 1940
Felix Jacoby’s Fragmente der Griechischen Historiker is a collection of ancient Greek historic texts that were lost, except for fragments (citations, extracts and summaries) found in other sources. Most entries in Jacoby Online focus on a lost author, but some entries contain anonymous fragments on a particular era or region, or even a single fragmentary text from a papyrus or manuscript.
Brills New Pauly is a reference work for students and scholars of the ancient world, together with the complete original Der Neue Pauly. Covers Graeco-Roman antiquity and its aftermath, including the history of classical scholarship.
Jacques-Paul Migne's Patrologia Latina comprises the works of the Church Fathers from Tertullian in 200 AD to the death of Pope Innocent III in 1216. The database contains the complete Patrologia Latina, including all prefatory material, original texts, critical apparatus and indexes. Migne's column numbers, essential references for scholars, are included.