Modern Hagiography
Lives of the Saints by Sabine Baring-Gould.
The Lives of Saints, with Other Feasts of the Year, According to the Roman Calendar by Peter Ribadeneira.
Medieval Hagiography
The Cult of Saints in Late Antiquity Database
Art & Architecture
Catalogo generale dei beni culturali
Warburg Institute Iconographic Database
Music
Nihil sub sole novum 