Sasanian dynasty rules Persia; Zoroastrianism is dominant religion.
Arab invasion brings end of Sasanian dynasty and start of Islamic rule.
Emergence of modern Persian language (or Farsi), written using a form of Arabic script.
Isfahan, major city of the Seljuk Turks
Decline of Islamic Caliphate; rise of Seljuk Turk dynasties.
Seige underway by Mongol forces
Invasion by Mongol forces of Genghis Khan.