Brett Veit By brettveit 162 dates for start of the Partian Empire 206 dates for start of the Han Empire 226 dates for end of the Partian Empire 300 dates for end of the Mauryan Empire 304 date Ashoka began promoting Buddhism 313 date Constantine issued edict allowing Christianity 320 dates for start of the Gupta Empire 323 date of the end of Alexander's Hellenistic Empire 336 dates of Alexander's Hellenistic Empire 550 dates for end of the Gupta Empire Oct 20, 1392 dates for end of the Han Empire Oct 20, 1616 dates for start of the Qin Empire Oct 20, 1622 dates for end of the Qin Empire Oct 20, 1905 dates for end of the Roman Empire Oct 20, 1921 dates for start of the Roman Empire Mar 2, 2022 dates for start of the Mauryan Empire