Good day!
For your consideration I give you this ... https://davidthomasdevine.wordpress.com/2017/11/28/mendev-kenabres-defender s-heart/
I haven't yet done the floor plans so I'm not entirely sure if it's the right height, but the horizontal dimensions match those in the maps. As I noted in the article, I think the building could also have basement levels, but I suspect that would be mainly for storage; to make sure it could fit 200+ people relatively comfortably, I'd have to figure out how many I can fit per floor, then likely add floors to compensate.