Modern Hagiography
Roman Martyrology – 7 February, 19 June
Lives of the Saints by Alban Butler.
Lives of the Saints by Sabine Baring-Gould.
The Liturgical Year by Dom Guéranger.
Pictorial Half Hours with the Saints by Auguste François Lecanu.
Miniature Lives of the Saints for Every Day in the Year
Memorials of the Blessed: A Series of Short Lives of the Saints by Charles B. Fairbanks.
“The Saint of the White Robe” in Saints of Italy by Ella Noyes.
The Lives of Saints, with Other Feasts of the Year, According to the Roman Calendar by Peter Ribadeneira.
Medeival Hagiography
There is an English translation of his life written shortly after his death by Peter Damian, but only a section on the miracles after his death is available.
Breviarium Romanum – Latin & English.
Writings by Saint Romuald
Art & Architecture
Catalogo generale dei beni culturali
POP : la plateforme ouverte du patrimoine
Warburg Institute Iconographic Database
Guide to Christian Iconography: Images, Symbols, and Texts
Frecoes in the Chiostro degli Angeli in Santa Maria degli Angeli in Florence
A Handbook of Christian Symbols and Stories of the Saints as Illustrated in Art by Clara Erskine Clement.
Lives and Legends of the English Bishops and Kings, Mediaeval Monks, and Other Later Saints by Mrs. Arthur Bell.
The Saints in Art with Their Attributes and Symbols, Alphabetically Arranged by Margaret E. Tabor.
Saints and their Symbols: A Companion in the Churches and Picture Galleries of Europe by E. A. Greene.
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.
Devotions
Manna for the Soul: Meditations for Every Day of the Year by Paulo Segneri.
Nihil sub sole novum 