Lugdunum was an important Roman city in Gaul, established on the current site of Lyon. The Roman city was founded in 43 BC by Lucius Munatius Plancus, but continued an existing Gallic settlement with a likely population of several thousands. It served as the capital of the Roman province of Gallia Lugdunensis and was an important city in the west…Lugdunum was an important Roman city in Gaul, established on the current site of Lyon. The Roman city was founded in 43 BC by Lucius Munatius Plancus, but continued an existing Gallic settlement with a likely population of several thousands. It served as the capital of the Roman province of Gallia Lugdunensis and was an important city in the western half of the Roman Empire for centuries. Two emperors, Claudius and Caracalla, were born in Lugdunum. In the period 69–192 AD, the city's population may have numbered 50,000 to 100,000, and possibly up to 200,000 inhabitants.