Dr Christopher Zeichmann (University of Toronto) has made available a very useful database for the study of early Christianity: The Database of Military Inscriptions and Papyri of Early Roman Palestine (DMIPERP).
This site is designed to aid the study of the military in the early Roman period for those interested in Judaism and Christianity of the first few centuries CE….
DMIPERP entries are divided roughly as follows: entries 1-132 were all found in Palestine and listed in roughly chronological order; entries 133-201 were texts not found in Palestine but discuss either the military in Palestine or those of a Palestinian background (esp. Jews and Gentiles born in Palestine); entries 202-224 are all surviving military diplomas for Judaea and Syria Palaestina; entries 225-296 are military diplomas of units or people originating in Palestine; entries 297-340 are Palestinian milestones erected by the military; entries 341-362 are all known pre-Constantinian military inscriptions involving Christians. There are 372 entries in total, with new entries being added following that number.