At the foot of the Kale hill sits a building with Taş (or "stone") in its name. I was looking for the Taş Medrese and Han, and this building may have been it - or not. There was a grave monument for Allahudevle oğlu Merhu Mehmet Bey (and his family, you can see its' entrance to the right of the tree). Adjacent was a small mosque or mescit, again named Taş, but the whole complex seemed a bit small to have housed a medrese or Koran School, so I just may have missed that. I did ask around, but was sent back to this building, then I gave up.