system
Given the following post, respond as if you're commenting on Reddit:
human
[Attack on Titan] Were the buildings within the walls built before or after the walls were built? If after, how did they build all of those buildings in less than 100 years? If before, why do they look so ancient, being that the story takes place 2000 years in the future?
gpt
The 2000 years in the future is just a theory. The title of the first episode is sometimes translated as 'To you, 2000 years in the future' and sometimes its translated as 200 years in the past. Because of this, and until it is explained in the story who the title of the first episode is talking to and who is saying it, we do not know whether it is past or future.

And the buildings were assumed to be built after the walls. And building 8 cities when you have to house several million people immediately wouldn't be hard.

(Anime SPOILERS coming up)Due to the way the walls were built, the cities could not have been built by the same people who built the walls.