Board Thread:Lore Discussion/@comment-27755354-20160423110115/@comment-1738746-20160428062832

Bromjunaar Sanctuary wasn't really destroyed, so much as it crumbled over time due to no one maintaining it anymore. Obviously this is just a guess because again, no proper info is disclosed, but I would hazard it transports you to mid-end Merethic era as this was the height (and beginning of the falling of) the Dragon Cult. If you take a look around, everything is in pristine condition and is being maintained, which makes me think the Priests are still around doing said maintenance.