Tell Leilan is an archaeological site situated near the Wadi Jarrah in the Khabur River basin in Al-Hasakah Governorate, northeastern Syria, a region formerly a part of ancient Assyria. The site has been occupied since the 5th millennium BC. During the late third millennium, the site was known as Shekhna. Around 1800 BC, the site was renamed "Shubat-Enlil" by the Assyrian king, Shamshi-Adad I and it became the capital of Assyria in northern Mesopotamia.