The cultivation of coffee began sometime in the fifteenth century, and for many centuries to follow, the Yemen province of Arabia was the world's primary source of coffee. The demand for coffee in the Near East was very high. The beans leaving the Yemeni port of Mocha for trade with Alexandria and Constantinople were highly guarded. In fact, no fertile plants were allowed to leave the country. Despite the restrictions, Muslim pilgrims from across the globe during their pilgrimages to Mecca managed to smuggle coffee plants back to their homelands, and coffee crops soon took root in India.