This old medrese (theological college) was founded in 1385 by İsa Bey. As one of the best preserved buildings in Mardin, it should be top of your things to do tick list. 

The complex is comprised of a domed mosque, a mausoleum, and two tranquil inner-courtyards. The architectural highlight of the building is the intricately decorated and imposing doorway, which is a beautiful example of Islamic artistry. 

For those not so interested in stonework, don't miss climbing the stairs to the rooftop, where you'll be rewarded with panoramic views over the town.