This old madrassa (theological college) was founded in 1251 by the Seljuk emir Celaleddin Karatay. The building was recently restored and is now an impressive museum showcasing Seljuk enamel tile work.
Although touring a tile museum may sound like a rather niche tourist attraction, the sheer beauty of the building makes this one of the top things to do on a Konya sightseeing itinerary.