Modern Hagiography
Lives of the Saints by Sabine Baring-Gould.
Medieval Hagiography
Writings to Saint Heliodorus
Jerome, Letter XIV to Heliodorus
Art & Architecture
3 July – Saint Heliodorus of Altino
2 July – Saint Processus and Saint Martinianus
Baptizetur unus quisque vestrum.
Be baptized every one of you.
Acts 2.38
Interrogabant autem et milites dicentes, quid faciemus et nos?
And the soldiers also asked him, saying: And what shall we do?
Luke 3.14
Modern Hagiography
Lives of the Saints by Alban Butler.
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
Saint Processus, Martyrdom of Saint Processus, Saint Martinianus, Martyrdom of Saint Martinianus
Catalogo generale dei beni culturali
POP : la plateforme ouverte du patrimoine
The Chapel of Saints Processus and Martinianus in San Pietro in Vaticano
The Saints in Art by Joseph Maria von Radowitz.
Emblems of Saints by Which They Are Distinguished in Works of Art by F. C. Husenbeth.
Music
2 July – Saint Otto of Bamberg
Modern Hagiography
Lives of the Saints by Alban Butler.
Lives of the Saints by Sabine Baring-Gould.
Lives of the Saints by Francis Weninger.
Stories of the Saints Fifth Series by Mary Seymour.
Medieval Hagiography
The Life of Otto, Apostle of Pomerania by Ebo and Herbordus.
Art & Architecture
Warburg Institute Iconographic Database
The Tomb of Saint Otto in Michaelsburg Abbey in Bamberg, Wikimedia Commons
Fresco of Saint Otto in Prüfening Abbey
Nihil sub sole novum 