While I don't care much about this, the name "Sanatorium" sounds awkward. For me at least, it does not have a very medieval feel to it. The word is associated more with primitive mental wards and the sort of hospitals that predated the practice of hand washing and the discovery of germs. "Medical Tent" would have been a better name for it.
Personally, I would give it some character and embed it into the settings a bit more. Perhaps make it a hot spot for practitioners of blue and crystal way and for those who are part of the science faction.
Also.. the tent does not look like it fits in the wealthy city of Hydlaa. It looks temporary. It would be more fitting to have an impromptu sort of medical tent like this on a battle field or perhaps in a poor city ( or enki city where tents are the norm ).
Just my 4 1/2 cents.