Kroscalan Empire

The Kroscalan Empire was one of the earliest human civilizations on Aeramis. The capital city, Izzo Eri, lay to the north within the region known today as The Wold. The Kroscalan Empire was eventually swallowed up by the The Realm of Aerlon in the early Fifth Age.
Somewhat famously, Kroscala is known for interring its dead within crypts, and it has been long theorized that massively extensive catacombs lay deep underground within the entirety of the Wold.