Edit: Forgot to thank you for the tutorial.
I was thinking it's going to be a steel frame building with a brick and stone facade.
Vvardenfell is a volcanic island, and therefor most likely seismically active.
Brick mortar liquefies during earthquakes, so it should be a steel building with a facade,
much like London's tower bridge. Also the bricks were infused with the
vapors from netch air sacs to reduce weight and enchanted in a way that makes them attract to each other.
So bricks that been knocked loose are floating around the structure.
As for the look, I was thinking very similar to the watchtower of my hometown's
city hall.(click the link under the picture for a better resolution pic.)