Coordinates: Arslan Tash (Turkish; Arslan - Lion, Taş - Stone), ancient Hadātu, is an archaeological site in northern Syria, in Aleppo Governorate, around 30km east of the Euphrates River and nearby the town of Ain al-Arab.
The city was the center of an Aramean Iron Age kingdom, which was conquered by Assyria in the 9th century BC. The site includes a Late Assyrian palace, an early shrine to Ishtar and a Hellenistic temple, surrounded by city walls and gates adorned with lions carved from stone.
The site of Arslan Tash was first examined in 1836 by an expedition led by Francis Rawdon Chesney. The first actual excavations were conducted by the French archaeologist François Thureau-Dangin for the Louvre Museum in two short seasons during 1928.
In 2007 and 2008 work at the site resumed when surveys were conducted by a team from University of Bologna and Directorate-General of Antiquities and Museums of the Syrian Arab Republic. The team was led by Anas al-Khabour and Serena Maria Cecchini. Each season lasted about a week, with the later one including geophysical work.
The Arslan Tash reliefs are bas-reliefs of people and animals on the gates of the city and temple. The dating of the reliefs is uncertain, though one contains an inscription of Tiglath-Pileser III of the Neo-Assyrian Empire
- Geoffrey Turner, The Palace and Bâtiment Aux Ivoires at Arslan Tash: A Reappraisal, Iraq, vol. 30, no. 1, pp. 62-68, 1968
-  Francis Rawdon Chesney, The expedition for the survey of the rivers Euphrates and Tigris, carried on by order of the British government, in the years 1835, 1836, and 1837, Longman, Brown, Green, and Longmans, 1850
- F. Thureau-Dangin et al., Arslan-Tash, P. Geuthner, 1931
- Pauline Albenda, The Gateway and Portal Stone Reliefs from Arslan Tash, Bulletin of the American Schools of Oriental Research, no. 271, pp. 5-30, 1988
- Jacobus van Dijk, The Authenticity of the Arslan Tash Amulets, Iraq, vol. 54, pp. 65-68, 1992