Islamic Republic of Iran

جمهوری اسلامی ایران (Persian)
Jomhuri-ye Eslāmi-ye Irān
• Median Empire
c. 678 BC
• Achaemenid Empire
550 BC
• Parthian Empire
247 BC
• Sasanian Empire
224 AD
• Buyid Empire
934 AD
• Safavid Empire
1501
• Islamic Republic
1 April 1979
• Current constitution
24 October 1979
• Constitution amended
28 July 1989