Gaius Asinius Quadratus (Γάϊος Ἀσίνιος Κοδρᾶτος ὁ Ἱστορικός) was a Greek historian of the Roman imperial period active in the 3rd century CE. He lived during the reign of Emperor Alexander Severus (222–235 CE) and likely into the subsequent era [1]. His Roman nomen and the title "clarissimus" indicate he was a senator, reflecting the integration of Greek intellectuals into the Roman elite [1][2].

His only known work is A History of Rome in Fifteen Books, also called The Millennium or Chilieteris. This lost history, composed in the archaic Ionic dialect, covered a thousand years from Rome's foundation to the reign of Alexander Severus and survives only in fragments [1][2][3].

Quadratus is significant as a Greek historian writing Roman history for a Greek audience within the Empire. His deliberate use of the Ionic dialect was an archaizing imitation of Herodotus, characteristic of the Second Sophistic movement [1][2]. His work was used as a source by later Byzantine compilers, and his senatorial rank provides a perspective from within the imperial administration he described.

Sources 1. Oxford Research Encyclopedia of Classics: https://oxfordre.com/classics/view/10.1093/acrefore/9780199381135.001.0001/acrefore-9780199381135-e-800 2. Perseus Digital Library, Suda Encyclopedia, entry for Asinius Quadratus: http://www.perseus.tufts.edu/hopper/text?doc=Perseus%3Atext%3A2008.01.0613%3Aentry%3D%2394 3. ToposText, Asinius Quadratus: https://topostext.org/people/1410