Modern Hagiography
Bibliotheca Sanctorum (identifies Saint Victor of Marseilles as that Victor whose cult is in Xanten)
Medieval Hagiography
Acta Sanctorum (with Saint Gereon)
The Cult of Saints in Late Antiquity Database
Art & Architecture
Xanten, Cathedral Church, large Victor shrine in the main altar (1150) (small shrine above)
Nihil sub sole novum 
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