Which desert surrounds the ancient city of Merv in present-day Turkmenistan?

The ancient city of Merv stood on the southern edge of the Karakum Desert in present-day Turkmenistan. Its survival and prosperity depended on the Murghab River, whose waters formed a fertile oasis amid one of Central Asia’s great arid regions.

Merv was not simply an isolated ruin in empty sand. The river created an inland delta that supported agriculture and made the settlement a crucial stopping point on routes linking Afghanistan, northeastern Iran, Khwarezm, Bukhara, and Samarkand. Irrigation canals allowed people to grow cereals, fruit, rice, and cotton in the oasis.

The city flourished repeatedly under Persian, Hellenistic, Arab, and Seljuk rulers. In the 11th and 12th centuries, it became a capital of the Great Seljuk Empire and a major center of scholarship. Medieval accounts describe extensive libraries, and the polymath Omar Khayyam spent years working at Merv’s observatory.

Merv is sometimes confused with other Silk Road cities near Central Asian deserts, including those near the Kyzylkum. The key geographic clue is the Murghab oasis on the southern margin of the Karakum, which covers much of Turkmenistan.