These have been common in parts of eastern Europe and as far as central Asia. Travellers and caravans often lodged at caravansaries. These inns were quadrangular in form and enclosed by massive walls with small windows near the top and provided a safe haven from bandits and enemy raiders. The central court, which was surrounded by an arcade and storerooms, was large enough to hold 300 to 400 camels. The name was formed from the word caravan and the Persian word sarai, meaning “palace” or “inn.” They were particularly common along the Silk Road between east and west.