Modern Hagiography
Roman Martyrology (3 December)
“The Marvellous Sword” in Saints of Italy by Ella Noyes (Dent, 1901).
The True Story of the Sword in the Stone (an audiobook).
Contemporary Hagiography
Scholarly Articles
“San Galgano: A Cistercian Monastery of the Middle Ages” (photos of the ruins and a plan of the complex)
Art & Architecture
Catalogo generale dei beni culturali
Medieval Religion Listserv – 2015 Dillon.
Warburg Institute Iconographic Database
Adoration of the Shepherds between Saints Augustine and Galgano by Giovanni d’Ambrogio
Nihil sub sole novum 