Tell Leilan is an archaeological site situated in Al-Hasakah Governorate, northeastern Syria, a region formerly a part of ancient Assyria. 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. Shubat-Enlil was abandoned around 1700 BC.