Antigonus II Gonatas was a Macedonian Greek ruler who solidified the position of the Antigonid dynasty in Macedon after a long period defined by anarchy and chaos and acquired fame for his victory over the Gauls who had invaded the Balkans.

The Antigonid dynasty was a Macedonian Greek royal house which ruled the kingdom of Macedon during the Hellenistic period. Founded by Antigonus I Monophthalmus, a general and successor of Alexander the Great, the dynasty first came to power after the Battle of Salamis in 306 BC and ruled much of Hellenistic Greece from 294 until their defeat at the Battle of Pydna in 168 BC, after which Macedon came under the control of the Roman Republic.