Demetrius I of Syria

Demetrius I Soter
Drachma coin depicting Demetrius I
Basileus of the Seleucid Empire King of Syria
Reign	161–150 BC
Predecessor	Antiochus V Eupator
Successor	Alexander Balas
Born	185 BC
Died	150 BC (aged 34 or 35)
Spouse	Apama Laodice V
Issue	Demetrius II Nicator Antiochus VII Sidetes Antigonus
Dynasty	Seleucid
Father	Seleucus IV Philopator
Mother	Laodice IV

Demetrius I (Greek: Δημήτριος Α`, born 185 BC, reigned 161–150 BC), surnamed Soter (Greek: Σωτήρ - "Savior"), was a ruler of the Hellenistic Seleucid Empire.

Demetrius was sent to Rome as a hostage during the reign of his father Seleucus IV Philopator and his mother Laodice IV. When his father was murdered by his finance minister Heliodorus in 175 BC., his uncle Antiochus IV Epiphanes killed the usurper, but usurped the throne himself. When Antiochus IV died in 163 BC., his 9-year-old boy son Antiochus V Eupator was made king by Lysias. Demetrius was then 22 years old (thus he was born in 185 BC). He requested the Roman Senate to restore the Syrian throne to him, but was rejected, since the Romans believed that Syria should be ruled by a boy rather than a man. Two years later, Antiochus V was greatly weakened because Rome sent an emissary to sink his ships and hamstring his elephants for his violation of the Peace of Apamea, storing up too much weaponry. Demetrius escaped from confinement and was welcomed back on the Syrian throne in 161 BC. He immediately killed Antiochus V and Lysias.

Demetrius I is infamous in Jewish history for his victory over the Maccabees, killing Judas Maccabaeus in Nisan, 160 BC. Demetrius acquired his surname of Soter, or Savior, from the Babylonians, whom he delivered from the tyranny of the Median satrap, Timarchus. Timarchus, who had distinguished himself by defending Media against the emergent Parthians, seems to have treated Demetrius' accession as an excuse to declare himself an independent king and extend his realm into Babylonia. His forces were however not enough for the legal Seleucid king: Demetrius defeated and killed Timarchus in 160 BC, and dethroned Ariarathes, king of Cappadocia. The Seleucid empire was temporarily united again. Demetrius may have married his sister Laodice V, by whom he had three sons Demetrius II Nicator, Antiochus VII Sidetes and Antigonus.