The Caravanserai

Typical buildings of Persian culture

A caravanserai (or caravansary; /kærəˈvænsəˌraɪ/) was a roadside inn where travelers (caravaners) could rest and recover from the day's journey. Caravanserais supported the flow of commerce, information and people across the network of trade routes covering Asia, North Africa and Southeast Europe, most notably the Silk Road. Although many were located along rural roads in the countryside, urban versions of caravanserais were also historically common in cities throughout the Islamic world, though they were often called by other names such as khan, wikala, or funduq.

The word کاروانسرای kārvānsarāy is a Persian compound word combining kārvān "caravan" with sarāy "palace", "building with enclosed courts". Here "caravan" means a group of traders, pilgrims or other travellers, engaged in long-distance travel. The word is also rendered as caravansary, caravansaray, caravanseray, caravansara, and caravansarai. In scholarly sources, it is often used as an umbrella term for multiple related types of commercial buildings similar to inns or hostels, whereas the actual instances of such buildings had a variety of names depending on the region and the local language. However, the term was typically preferred for rural inns built along roads outside of city walls.

The word serai is sometimes used with the implication of caravanserai. A number of place-names based on the word sarai have grown up: Mughal Serai, Sarai Alamgir and the Delhi Sarai Rohilla railway station for example, and a great many other places are also based on the original meaning of "palace".
Source: Wikipedia