Khiva sits on the southern edge of the Amu Darya delta, in the ancient region of Khwarezm — one of the great Iranian civilisations Central Asia rarely gets credit for. Khwarezmian was written in an Aramaic-derived script until the 13th century; Al-Biruni (973–1048), one of the great polymaths of the Islamic Golden Age, was born nearby in Kath.
From the 17th to the 19th century Khiva was the capital of the Khivan Khanate — a slave-trading power notorious across the Russian frontier. Persian, Russian and Turkmen captives were sold in the Palvan-Darvoza market inside the walls; the Russian empire eventually used Khivan slaving as pretext for its 1873 conquest. The last Khan of Khiva was deposed in 1920 by the Bolsheviks.
Because most of Ichan Kala was rebuilt in the 18th–19th centuries under active Khivan patronage, the surviving fabric is unusually intact — 60 monuments inside 2.2 km of walls. UNESCO inscribed Itchan Kala in 1990, making it the first World Heritage Site in Central Asia.