Eli5: Why are cities, towns, … built on top of other towns during history?

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My town is built on a settlement which, estimated is 2000 years old. How does this work? As far as I know people always lived here (old Roman and medieval roads were found) but the town now lies several meters higher than the original one. I would suspect that old buildings are taken down and a new one is raised.

Does sediment, dust, … stacks meters high over a period of 2000 years and wouldn’t people dig out old buildings? Or did they purposely mound the entire town?

In: Engineering

4 Answers

Anonymous 0 Comments

It’s still a good question. You’d think that if they replace one building at a time, they would build them at the level of their neighboring buildings. The only exception I can think of is if large sections got destroyed at once from fire, earthquake, etc. Then you would probably end up building higher.

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