Kukeldash Madrasah in Tashkent is a cool medieval building that was built around 1570 by the Shaybanid ruler, Dervish Sultan. It's made of yellow brick and has a traditional square shape with a big portal and an inner yard where students used to hang out. The madrasah has been through some renovations and even served as a museum at one point, but now it's back to being a madrasah again. So, if you're into history and architecture, this place is definitely worth checking out!