I don't have my books with me. How old is the lastest incarnation of Sharn? I know it was built and leveled a couple of times. How old is that latest version?
I'm looking to define a timeline. Something like, the top level of Sharn has towers build in in the last 300? years. Middle Sharn was 300 to 600? years old, while lower Sharn building are 1,000? years old. However the chambers below the city go back 5000? years to the first goblin inhabitants.
I think the books say that the most recent incarnation of Sharn goes back to the beginning of the kingdom of Galifar. Prior to that, there were goblinoid ruins on the site, and before that there has been a trading post there as long as human or goblin history can recall.