4 May – Saint Gotthard of Hildesheim

Modern Hagiography

Roman Martyrology

Lives of the Saints by Alban Butler.

Medieval Hagiography

BHL, Supplement

Writings by Saint Gotthard of Hildesheim

Documenta Catholica Omnia

Art & Architecture

13C Baptismal Font in Hildesheim Cathedral

Portal Sculpture in Hildesheim

Warburg Institute Iconographic Database

A Guide to Christian Iconography: Images, Symbols, and Texts

Medieval Religion Listserv – 2016 Dillon.

Post-Biblical Saints Art Index

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.

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