Caravanserai and Trade Infrastructure

Long-distance overland trade across Eurasia and North Africa depended on physical infrastructure every bit as much as on the political and commercial arrangements that made the trade profitable, and the single most characteristic element of that infrastructure was the caravanserai (from Persian karvan, "caravan," and saray, "palace" or "building"): a large, fortified roadside inn built around a central courtyard, typically spaced roughly one day's camel journey apart — commonly cited as around 30 to 40 kilometers — along major routes, offering merchants secure overnight lodging, stabling and fodder for pack animals, storage for goods, and often a small mosque, bath, or market space within its walls. Caravanserai architecture, while varying regionally, followed broadly consistent functional logic across Persia, Anatolia, Central Asia, and North Africa: a single fortified gateway large enough to admit laden camels, a rectangular or square courtyard surrounded by covered arcades and storage rooms on the ground floor, and often sleeping quarters or additional storage on an upper level, a design that balanced defensibility against bandits with the practical needs of loading, unloading, and resting large caravans.