Lugdunum is a classical Roman place name, most commonly referring to one of two places:
Lugdunum, Gaul; now Lyon, France Lugdunum Batavorum, a castellum on the mouth of the Rhine river near Katwijk, Netherlands
Other places: Lugdunum Convenarum, now Saint-Bertrand-de-Comminges, France Lugdunum Clavatum, now Laon, France Lugdunum Consoranorum, now Saint-Lizier, France
Lugdunum may also refer to: Lugdunum (museum), formerly the Gallo-Roman Museum of Lyon-Fourvière, in Lyon, France Lugdunum Server, a server software for the EDonkey network