16 January – Saint Marcellus

San Pietro in Civate (photo of author)

Modern Hagiography

Roman Martyrology

Sanctorale Catholicum

Lives of the Saints by Alban Butler.

Lives of the Saints by Sabine Baring-Gould.

The Liturgical Year by Dom Guéranger.

Character Calendar

La vie des saints 

La vie des saints

The lives of saints, with other feasts of the year, according to the Roman calendar by Peter Ribadeneira.

Medieval Hagiography

BHL, Supplement

Acta Sanctorum

The Cult of Saints in Late Antiquity Database

Breviarium RomanumLatin & English

Liber pontificalis

The Golden Legend (and illustrations)

Writings of Pope Marcellus

Documenta Catholica Omnia

Art & Architecture

Index of Medieval Art
– East Wall of Old Saint Peter’s, Biblioteca Apostolica Vaticana, MS. Barb.lat.2733.pt.1, ff. 120v-121r

– San Pietro al monte in Civate – Narthex, portal, north wall: Marcellus I, Pope: Scene, celebrating Mass – Within building, Marcellus, name inscribed [MAR]CELLUS [P]AP[A], nimbed, tonsured, in bishop’s vestments, crozier in left hand, right hand extended toward group of men, hands of foremost extended; below, inscription ACCEDITE FILII ET INLUMINAMINI ET SABO[…] TR[…]ESURAS. (from the IMA, above, see also)

El Escorial, Real Biblioteca, Cod. Vitrinas 17, folio 5v: SANCTVS MARCELLVS XXXI PAPA (detail above)

Morgan-Mâcon Golden Legend, Morgan Library MS M.672-5 I, fol. 88r: Marcellus I, Pope: celebrating Mass — Marcellus I, nimbed, tonsured, wearing vestments, stands before draped altar, adorned with candles, side curtains and columns surmounted by sculptures. On altar are open, inscribed book on lectern and retable depicting Crucifixion scene with nimbed bishop, Virgin Mary, Evangelist John, and another nimbed figure. Two male figures, possibly acolytes, and another male figure, tonsured, wearing vestments, flank altar. The signature and possibly name of artist LOYSIT(?) appears on him of third figure. (from the IMA, above)

Catalogo generale dei beni culturali

BeWeB

Portail Biblissima, also

POP : la plateforme ouverte du patrimoine

Warburg Institute Iconographic Database

Medieval Religion Listserv

Guide to Christian Iconography: Images, Symbols, and Texts

Vatican Colonnade

The church of San Marcello al Corso in Rome – info, photos.

Sistine Chapel, Entrance Wall

in situ
Post-Biblical Saints Art Index
Saints and their Attributes

Lives and Legends of the Great Hermits and Fathers of the Church, with Other Contemporary Saints by Mrs. Arthur Bell.

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

Cantus: A Database for Latin Ecclesiastical Chant