The ICS Historic Archive is a collection of approximately 4,000 digitized images of photographs, pictures, and drawings assembled by American art historian Estelle Shohet Brettman (1925-1991) for the exhibit Vaults of Memory on iconography in the catacombs of Rome. They originate from various archives and museums, or were taken in situ by Mrs. Brettman herself or by photographers she commissioned. Preview the images in the Brettman Collections at Photographic Archive Records (link)
The Estelle Shohet Brettman Archaeology Study Collection consists of photographs from the 1950's to 1980's of various Mediterranean sites, including locations in Israel, Italy (including Sicily), Greece, Morocco, and Egypt. These are open source albums (CC BY 4.0).
Plates 1-267 from Joseph Wilpert, Die Malereien der Katakomben Roms, 1903. Plates 1-300 from Joseph Wilpert, Die römischen Mosaiken und Malereien der kirchlichen Bauten vom IV. bis XIII. Jahrhundert, 1916 (in preparation).
The archives of Harvard professor and ICS director Annewies van den Hoek include extensive documentation of Greek and Roman inscriptions in catacombs and museums, the architecture and art of early Christian churches in Rome, and other collections of artifacts from the Greco-Roman world.
Early Christian Sarcophagus Collection in Arles, Museum of Antiquity/Musée départemental de l'Arles Antique, photographed and arranged by ICS director Prof. Arthur Urbano, Professor of Theology, Providence College.
Images of the "Mausoleum" of Galla Placidia, the Orthodox and Arian Baptisteries, Sant'Apollinare Nuovo, Sant'Apollinare in Classe, and San Vitale photographed by ICS director Prof. Arthur Urbano.