GENERAL PERIODS OF ALEXANDRIA
THE PTOLEMAIC LAGID DYNASTY, 305-30 BC
All dates are BC.
ROMAN EMPERORS
All dates are AD unless BC is stated.
Julio-Claudian Dynasty
Year of the Four Emperors
Flavian Dynasty
The Five Good Emperors
Severan Dynasty
Crisis of the Third Century (Emperors During the Height of the Crisis)
Gallic Empire, 260-274
Illyrian Emperors
Tetrarchy and Constantinian Dynasty
Britannic Empire, 286-297
Valentinian Dynasty
Theodosian Dynasty
Western Empire
BYZANTINE EMPERORS
All dates are AD.
EARLY ISLAMIC CALIPHS
All dates are AD.
(570-632) (The prophet Muhammad) 632-634 First caliph Abu Bakr 634-644 Second caliph Omar 644-656 Third caliph Uthman
LIBRARIANS OF ALEXANDRIA
All dates are BC and all are uncertain.
Uncertain librarians following the persecution of scholars by Ptolemy VIII Euergetes II: