Marcus Magius Maximus was an eques active during the reign of the emperor Augustus. Maximus was prefect of Roman Egypt from AD 12 to 14.Guido Bastianini, "Lista dei prefetti d'Egitto dal 30a al 299p", Zeitschrift für Papyrologie und Epigraphik, 17 (1975), p. 269 It was thought Maximus had been appointed prefect of Egypt twice -- the only person to hold this office twice -- based almost solely on a problematic passage in Philo's In Flaccum, but John Rea has shown this passage can be read more plausibly in a different way, removing all support for this belief.Rea, "Five Papyrological Notes on Imperial Prosopography", Chronique d'Egypte, 43 (1968), pp. 365-367
While prefect of Egypt, Maximus had an obelisk that Ptolemy II Philadelphus had erected as a memorial to his wife and sister Arsinoe II in Alexandria moved to the market-place because it was in the way of the harbor.Pliny the Elder, Naturalis Historia, xxxvi.68f
An inscription from Aeclanum near Beneventum suggests that Magius Maximus was also procurator of Hispania Tarraconensis. = ILS 1335 However, H. G. Pflaum has argued that the more usual path from procurator of that province was to that of Syria, which would make Maximus' inferred career unusual.Pflaum, "A propos des Préfets d'Égypte d'Arthur Stein", Latomus, 10 (1951), pp. 472f
References
Further reading Rudolf Hanslik, "Marcus Magius Maximus II 3", Der Kleine Pauly, Band 3 (Stuttgart 1969), col. 882.