the treasury holds some of the most famous and spectacular jewels in the world, including the famous topkapı dagger. in 1747, the sultan had this dagger made for nadir shah of persia, but the shah was assassinated before the emissary had left the ottoman empire's boundaries and so the sultan retained it. there are three large emeralds in the hilt and the sheath is worked with diamonds and enamel. this dagger was the subject of the famous film "topkapi".