Carchemish is a large antiquity site on the west bank of the Euphrates River about 60 miles northeast of Aleppo. It is situated at an important crossing point of the Euphrates River and trade routes from the east (Assyria and Babylonia) passed through it on their way to the Levant and/or Turkey (Hittite country).
The huge mound (220 acres) lies on the Turkish/Syrian border with 135 acres in Turkey and 85 acres in Syria (Jerablus). It consists of an Outer Town, an Inner Town, and a Citadel. To this casual observer, it reminds me of Hazor in Israel, also about 200 acres in size, with a citadel and a large lower town.
It is mentioned numerous times in ancient Hittite, Egyptian, Assyrian, Babylonian, etc. texts as well as in the Bible (Isaiah 10:9; Jeremiah 46:2-3; 2 Chronicles 35:20). It was the scene of the famous battle between the Egyptian Pharaoh Neco II who was defeated by the Neo-Babylonian King Nebuchadnezzar II in 605 BC—see Jeremiah 46 and the Babylonian Chronicl
It was inhabited from the third millennium BC to the 10th century AD. Many have excavated there since the late nineteenth-century up until the present. It is famous for the many reliefs, inscriptions, tablets, and small finds that were discovered there.
For a convenient summary see: Carchemish. (2024, November 1). In Wikipedia. https://en.wikipedia.org/wiki/Carchemish