170 BC Chr.

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Heads of state

170 BC Chr.
Ptolemy VI , Cleopatra II and Ptolemy VIII rule Egypt together .
Epirus changes to the side of Perseus of Macedonia in the Third Macedonian-Roman War .
170 BC In other calendars
Buddhist calendar	374/375 (southern Buddhism); 373/374 (alternative calculation according to Buddha's Parinirvana )
Chinese calendar	42nd (43rd) cycle , year of the metal sheep辛未 ( at the beginning of the year metal horse 庚午)
Greek calendar	2nd / 3rd Year of the 152nd Olympiad
Jewish calendar	3591/92
Roman calendar	from urbe condita DLXXXIV (584)
Seleucid era	Babylon: 141/142 (turn of the year April); Syria: 142/143 (turn of the year October)

Events

Politics and world events

North Africa and Asia

• Beginning of the year: Pharaoh Ptolemy VI. of Egypt is declared of legal age. He declares his wife and sister Cleopatra II to be co-regent and his younger brother Ptolemy VIII to be co-regent. A little later there was the Sixth Syrian War between Egypt and the Seleucid Empire under Antiochus IV , which presumably had his nephew and co-regent of the same name eliminated in August.

• After the death of Phriapatios his son Phraates I becomes ruler of the Parthian Empire . He begins with attacks on the Seleucid Empire.

Europe

• Under the hapless Aulus Hostilius Mancinus , the Romans failed to gain space in the Third Macedonian-Roman War . Meanwhile Perseus of Macedonia concludes a separate peace with Genthios of Illyria . After the first break with Perseus at the beginning of the war, he is aware that the Romans will no longer see him as an equal ally and decides to take the side of the supposed future victor. Epirus also changes to the side of Perseus.
• Cincibilus , King of Noricum , signs a friendship treaty with the Romans .

science and technology

Unit circle r = 1

• Hypsikles von Alexandria ("Anaphorikos") creates a degree of the circle in 360 degrees . With this he lays the basis for trigonometry in its preliminary form, the chord calculation.

Born

• around 170 BC Chr .: Lucius Accius , Roman tragedy poet († around 90 BC )

Died

• August: Antiochus , co-ruler of his uncle Antiochus IV in the Seleucid Empire

• Gaius Livius Salinator , Roman politician and military leader (* around 234 BC )
• Phriapatios , ruler of the Parthian Empire