The Chellah (Berber: Calla or Sla; Arabic: شالة, translit. Shillah),[2] is a medieval fortified Muslim necropolis located in the metro area of Rabat, Morocco, on the south (left) side of the Bou Regreg estuary. The Phoenicians established a trading emporium at the site and called it "Sala".[3][4] This was later the site of the ancient Roman colony of "Sala Colonia",[5] in the Roman province of Mauretania Tingitana.