Modern Hagiography
Lives of the Saints by Alban Butler.
Lives of the Saints by Sabine Baring-Gould.
The Liturgical Year by Dom Guéranger.
An Alphabet of Saints by Robert Hugh Benson, Reginald Balfour, and Charles Ritchie.
Victories of the Martyrs by Saint Alphonsus Liguori.
Legends of the Blessed Sacrament Gathered from the History of the Church and the Lives of the Saints by Emily Mary Shapcote.
The Lives of Saints, with Other Feasts of the Year, According to the Roman Calendar by Peter Ribadeneira.
Medieval Hagiography
Inscription at Tomb written by Pope Damasus (Carmen X)
The Golden Legend (and illustrations)
Writings by Pope Sixtus II
Art & Architecture
Catalogo generale dei beni culturali
Warburg Institute Iconographic Database
Cappella Niccolina, Palazzi Pontifici, Vatican painted by Fra Angelico (see also, and also)
Portrait in the Sistine Chapel by Sandro Botticelli
Music
Nihil sub sole novum 
