Antigonus III Doson: king of ancient Macedonia, ruled 229-221.
- Father: Demetrius the Fair (son of Demetrius Poliorcetes and Ptolemais)
- Mother: Olympias of Larisa
- Wife: Phthia (widow of Demetrius II)
- 229: Unexpected death of Demetrius II; Antigonus III Doson acts as regent for Demetrius' young son Philip V; to strengthen his claim, Antigonus marries Demetrius' wife Phthia
- He inherits the Demetrian War, against a coaliton of the Achaean League and Aetolian League, which are supported by king Ptolemy III Euergetes
- Antigonus defeats the Dardani and reconquers Thessaly, but loses Boeotia and the Greek towns in the south, including Athens
- 228 (?): Because the Seleucid Empire is weakened by a civil war between king Seleucus II Callinicus and Antiochus Hierax, Antigonus is able to intervene in Caria.
- 224: Aratus of Achaea asks help against the Spartan king Cleomenes III; Antigonus demands back Corinth.
- 222: Antigonus defeats Cleomenes (near Sellasia) and occupies Sparta
- Revolt in the north; Antigonus returns and is killed in action.
Succeeded by: Philip V