Prehistory: The Neanderthals from at least 100,000 years ago existed in Greater Iran during the Pleistocene and Pliocene eras. Modern human artifacts were found to have existed at least from 9000 B.C.E. This was before the civilizations of Elam and the migration of Indo-Iranians into the area in the 2nd millennium B.C.E., giving Persia its history and character.
Greater Iran was continuously occupied by civilizations from at least the 9th or 10th millennium B.C.E. Greater Iran is defined as spanning the lands from the Euphrates in the west to the Indus River in the east.
From the north it spans from the Caucasus, Caspian Sea, and Aral Sea to the Persian Gulf and the Gulf of Oman in the south.
Some of the most ancient civilizations of Greater Iran include the Jiroft culture in Kerman Province of southeastern Iran (dating back to the 4th millennium B.C.E.). These civilizations are followed by the non-Semitic, non-Aryan people of Elam who lived primarily in southeastern Iran from over 5000 years ago.
Iranian history represents a rich blend of legend, mythology, recorded fact and living tradition. Several civilizations have risen in various parts of the country at different times, each leaving its own impression on the subsequent development of Iranian history.
The oldest known civilization in Iran is that of Elam in the 10th century B.C. and the Assyrians in the 8th century B.C. Other major Iranian civilizations are Media, Achaemenids, Parthians and Sassanians. Unfortunately, most of the landmarks of these civilizations were demolished during the Arab and subsequent Mongol and Tatar invasions. The 16th century Safavids civilization that has the most lasting number of monuments has inherited from both Persian civilization and its invaders. Many other dynasties and monarchies succeeded the country until the Pahlavi that was once again demolished by the Islamic Revolution under the leadership of Imam Khomeini, in a way similar to its predecessors.
Iran has a long history of almost 7,000 years since the Aryans immigrated to the Iran Heights. Aryans gave their name to this land and called it "land of Aryans" or Iran. Achaemenid appeared in the 550 B.C. was the first unified dynasty and until it was conquered by Alexander of Macedonia (Eskandar e Maghdooni) in 330 B.C., Iran prospered as "The Great Persian Empire" for more than two centuries. Contributions of the Achaemenians to the world’s culture are numerous. Cyrus (Xerxes) The Great (550 B.C.) was the first emperor who conquered Elam and gave Jews freedom. He was also the first one who declared and practiced human rights. In the Great Persia Empire from East China to Libya, many nations were coexisting and all were declared free to pactice their own religion and follow their own traditions and customs. Daryush the Great (500 B.C.) was the first emperor who committed to digging the ancient Suez Channel, joining the Red and Mediterranean Sea. There are many landmarks left from the Achaemenian period mostly in Persepolis and Naghshe-rostam near present Shiraz.
~750 BC The Medes era: Deioces (728 to 675 BC) was the founder of the Median kingdom. The Median capital Ekbatana or Hegmataneh (Hamedan) was founded in this era.
~600 BC The Achaemenids era: The capital of Achaemenids was located in Fars in southwestern Iran. Many present day landmarks, such as Takhte-jamshid and Persepolis are from this era.
329 BC Defeat of the Achaemenids by Alexander. Aryo-barzan, a brave Persian commander fought to death with all his personnel and couldn't stop Alexander to invade and destroy the capital.
~250 BC The Parthians era began by defeating the Greeks.
226 AD The Sassanid era. The Sassanians overthrow the Parthians and established a vast and wealthy empire that included the Central Asia, Middle East, Turkey and North Africa.
The birth and death of Muhammad (S.A.), the prophet. 642
The Arab invasion. The Sassanid emperor Yazdgerd III was defeated by the Arabs at the Battle of Nahravan. Bisotoon, the capital of the Sassanian was destroyed. The palace and library hosting more the 20,000 old books and scripts were set on fire.
Uprising of the Shi'ite movement in Khorasan (Northeastern Iran) by Abu Moslem Khosasany who fought the Arabs and established the first independent Persian state in Khorasan.
The birth of the Saffarid dynasty by Yaqub Saffar who was the first leader to unite Persians under the Shi'ite flag.
The rise of the Samanid dynasty in Northeastern Persia. Eventually, Samanid overthrow the Saffarids in 900 AD. 962
Ghaznavid dynasty established in eastern Iran. The capital was Ghazneh located in present day Afghanistan. The Ghaznavids could defeat the Samanids in the early 11th cent and established a vast kingdom from India to Syria.
The Seljuqians era began by defeating the Ghaznavids at the Battle of Dandanqan, near Marv. Seljuqians' reign ended with the death of Sanjar, the last king of this dynasty around 1160 AD.
The rise of Kharazmshahian in Northeastern Iran.
The Mongol invasion. The Mongols captured nearly all Persia except the Fars. In Bukhara and Samarkand, they ruined and killed more than one million residents. Later the Il-Khanid dynasty was established in central Persia.
The Tatar invasion under the command of Timur and the reign of the Timurid rulers started. 1502
Safavid dynasty was established by Shah Ismail.
Nader Shah established the Afsharian dynasty by driving the Afghans out of Persia. He also captured Dehli and North India.
Qajar dynasty: “Nehdzat Mashrooteh” or the Constitutional Movement happened in this era and the first constitutional government was established.
Finally Pahlavi dynasty, a constitutional monarchy ... Concentrating on modernization, education and establishing close diplomatic relations with the Western countries were among the main objective of the King Reza and Mohammad Reza Pahlavi. The gap between the government and people's will, mostly due to corruption, ultra-speed modernization of the society and what was called unfair diplomatic relations, led to the Islamic movement in 1979, that established a kind of republic called Islamic Republic.