Colonia Copia Claudia Augusta Lugdunum (modern: Lyon, France) was a very important Roman city in Gaul. The city was founded in 43 BC by Lucius Munatius Plancus. It served as the capital of the Roman province of Gallia Lugdunensis. For 300 years after its foundation, Lugdunum was the most important city in the western part of the Roman Empire after Rome . Two emperors, Claudius (Germanicus) and Caracalla, were born in Lugdunum. In the time period 69–192 AD the city population could be as large as 50,000 to 100,000. Even figures of up to 200,000 people are proposed by Albert Grenier.