Apollonius ( grc, Απολλώνιος) of Chalcedon was an

ancient Greek Ancient Greek includes the forms of the Greek language used in ancient Greece and the ancient world from around 1500 BC to 300 BC. It is often roughly divided into the following periods: Mycenaean Greek (), Dark Ages (), the Archaic peri ...

Stoic who taught philosophy. He was invited by the Roman emperor Antoninus Pius to come to Rome, for the purpose of instructing his adoptive sons

Marcus Aurelius Marcus Aurelius Antoninus (Latin: áːɾkus̠ auɾέːli.us̠ antɔ́ːni.us̠ English: ; 26 April 121 – 17 March 180) was Roman emperor from 161 to 180 AD and a Stoic philosopher. He was the last of the rulers known as the Five Good ...

and

Lucius Verus Lucius Aurelius Verus (15 December 130 – January/February 169) was Roman emperor from 161 until his death in 169, alongside his adoptive brother Marcus Aurelius. He was a member of the Nerva-Antonine dynasty. Verus' succession together with ...

in philosophy. Aurelius, within his ''

Meditations ''Meditations'' () is a series of personal writings by Marcus Aurelius, Roman Emperor from AD 161 to 180, recording his private notes to himself and ideas on Stoic philosophy. Marcus Aurelius wrote the 12 books of the ''Meditations'' in Koine ...

'', writes of Apollonius favourably. Lucian writes of him:

When Apollonius was appointed professor of philosophy in the Imperial household, Demonax witnessed his departure, attended by a great number of his pupils. 'Why, here is Apollonius with all his Argonauts,' he cried.

Apollonius was also possibly from

Chalcis Chalcis ( ; Ancient Greek & Katharevousa: , ) or Chalkida, also spelled Halkida (Modern Greek: , ), is the chief town of the island of Euboea or Evia in Greece, situated on the Euripus Strait at its narrowest point. The name is preserved from ...

instead of Chalcedon, or, according to

Cassius Dio Lucius Cassius Dio (), also known as Dio Cassius ( ), was a Roman historian and senator of maternal Greek origin. He published 80 volumes of the history on ancient Rome, beginning with the arrival of Aeneas in Italy. The volumes documented the ...

, from

Nicomedia Nicomedia (; el, Νικομήδεια, ''Nikomedeia''; modern İzmit) was an ancient Greek city located in what is now Turkey. In 286, Nicomedia became the eastern and most senior capital city of the Roman Empire (chosen by the emperor Diocletia ...

, ''Roman History'' 71.35

Notes

1st-century Greek people 2nd-century Greek philosophers Roman-era Stoic philosophers {{AncientGreece-philosopher-stub