Final answer:
Hadrian's Wall was constructed in northern England, not France, and marked the northern limit of Roman Britain. It was part of the Roman limes system to defend against 'barbarian' invasions and underscored the Roman influence and military strategy in maintaining their empire's borders.
Step-by-step explanation:
The statement that Hadrian's Wall was built across modern-day France is false. Hadrian's Wall was actually constructed across what is now northern England during Roman times. Built by Emperor Hadrian in the second century CE, this massive fortification marked the northern limit of Roman Britain, not the civilized world as a whole. The Romans constructed forts, camps, and walls, like Hadrian's Wall, to fortify the frontier in Britain.
Emperor Hadrian, who ruled from 117 to 138 CE, was known for his extensive building projects which included not just Hadrian's Wall, but also the re-built Pantheon and the Temple of Venus and Roma. The fortifications like Hadrian's Wall served as a means to control access to the empire and represented the empire's reach and military strategy.