Djenné or Jenné (both: jĕnā´), town, S central Mali, on the Bani River. It is an agricultural market center. The nearby, pre-Islamic ruins of Jenné-Jeno, which at its height may have been a city of more than 15,000 people, date back to 250 BC In the 13th cent., Djenné itself became a great market for gold, slaves, and salt.