Unit one timeline By taniavill936 206 End of the Qin Empire 206 B.C. 206 Start of the Han Empire 206 A.D. 221 Start of the Qin Empire 221 B.C. 247 Start of the Parithian Empire 247 B.C. 264 Ashoka begins promoting Bhuddism 264 A.D. 313 Constatine issued the edict allowing Christianity 313 A.D. 320 Start of the Gupta Empire 320 C.E. 323 Start of the Hellenistic Age. 323 B.C.E. 323 Start of the Mauryan Empire 323 B.C. 330 End of the Roman Empire 330 C.E. 500 End of the Gupta Empire 500 A.D. Jan 1, 753 Start of the Roman Empire 753 B.C.E. Mar 2, 2022 End of the Parithian Empire 228 A.D. Mar 2, 2022 End of the Mauryan Empire 185 B.C.