Original: In 1747, the Sultan Mahmud I had this dagger made for Nadir Shah of Persia, but the Shah was assassinated in connection with a revolt before the emissary had left the Ottoman Empire's boundaries and so the Sultan retained it.
Simplified: 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.