Alix is a French-Belgian comic series created by Jacques Martin in 1948. It may be considered the serious, historically accurate counterpart to the more famous Asterix, which it actually predates. It is a classic example of the ligne claire school popularized by Hergé.
The title character is a young Gaul from the 1st century BCE who, after being captured and enslaved, is adopted by a rich Roman and becomes a Roman citizen himself. He goes through various adventures that take him all over The Roman Republic and beyond—at one point, all the way to Han Dynasty China—and becomes a friend of Julius Caesar. His sidekick is a teenage Egyptian boy, Enak, and his nemesis is a scheming Greek named Arbaces.
In 2012, a sequel series came out titled Alix Senator. As the name implies, it takes place several years later, with Julius Caesar long dead, Alix now a Roman Senator, and Enak having disappeared long ago. (Text from TV Tropes)