Which emperor built a wall around Rome?

Answer 1

The first complete circuit of walls around Rome was built by Servius Tullius, the 6th king of Rome, in the 6th century BC. They were called the Servian Walls. They were rebuilt in the 380s and 370s BC during the Republic probably because they fell in disrepair. Its length was 11 kilometres (7 miles). The biggest surviving fragment of these walls is near the main railway station.

After this the Romans did not bother to build new walls for centuries even though the city had greatly outgrown the old Servian Walls because they did not expect the city to be attacked. This changed in 270 AD the Alemanni (a Germanic people) attacked the city. Following this, emperor Aurelian built new walls, the Aurelian Walls, between 271 and 275 AD. Because the city had grown enormously, these walls were much longer: 19 kilometres (12 miles). Several kilometres of these still exist and they can be followed by car. Some of its great gates also still exist, including those on the famous Appian Way.

Answer 2

on the ground