This mosque and madrassa (Muslim seminary) is a Mameluke monument, built in the mid-1300s. It's considered one of the most stylistically cohesive Islamic buildings in Cairo. The entrance and staircase are especially noteworthy. For a £E 5 baksheesh (tip) to the caretaker, the truly adventurous can climb the minaret. It's a long, dark climb (be sure to take a flashlight), but the view from the top is well-worth the effort. Daily 9 am till one hour after sunset prayer. No visitors are admitted during prayers. Free. El-Qalaa Street, directly below the Citadel (Islamic Cairo), Cairo.