Roman province, one of the three administrative divisions of
Gaul. It extended northwest from its capital at Lugdunum (modern
Lyon) and included the land between the
Seine and
Loire rivers up to
Brittany and the Atlantic coast. It was conquered by Julius
Caesar during the
Gallic Wars and became a Roman province in 27 under
Augustus.
For more information on Lugdunensis, visit Britannica.com.