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Iran, officially the Islamic Republic of Iran is a country in Western Asia.The name IranSassanian era and came into use in the Western world in 1935, before which the country was widely known as Persia. Both Persia and Iran are used interchangeably in cultural contexts; however, Iran is the name used officially in political contexts.The name Iran is a cognate of Aryan, and means "Land of the Aryans". has been in use natively since the

The 18th largest country in the world in terms of area at 1,648,195 km², Iran has a population of over 70 million. It is a country of particular geostrategic significance owing to its location in the Middle East and central Eurasia. Iran is bordered on the north by Armenia, Azerbaijan and Turkmenistan. As Iran is a littoral state of the Caspian Sea, which is an inland sea and condominium, Kazakhstan and Russia are also Iran's direct neighbors to the north. Iran is bordered on the east by Afghanistan and Pakistan, on the south by the Persian Gulf and the Gulf of Oman, on the west by Iraq and on the north west by Turkey. Tehran is the capital, the country's largest city and the political, cultural, commercial and industrial center of the nation. Iran is a regional power,and holds an important position in international energy securityworld economy as a result of its large reserves of petroleum and natural gas. and

Iran is home to one of the world's oldest continuous major civilizations.The first Iranian dynasty formed during the Elamite kingdom in 2800 BCE. The Iranian Medes unified Iran into an empire in 625 BCE.They were succeeded by the Iranian Achaemenid Empire, the Hellenic Seleucid Empire and two subsequent Iranian empires, the Parthians and the Sassanids, before the Muslim conquest in 651 CE. Iranian post-Islamic dynasties and empires expanded the Persian language and culture throughout the Iranian plateau. Early Iranian dynasties which re-asserted Iranian independence included the Tahirids, Saffarids, SamanidsBuyids. and

The blossoming of Persian literature, philosophy, medicine, astronomy, mathematics and artSaffarids and Samanids. Iran was once again reunified as an independent state in 1501 by the Safavid dynasty—who promoted Twelver Shi'a Islam as the official religion of their empire, marking one of the most important turning points in the history of Islam. "Persia's Constitutional Revolution"the nation's first parliament in 1906, within a constitutional monarchy. Iran officially became an Islamic republic on 1 April 1979, following the Iranian Revolution.became major elements of Muslim civilization and started with the established

Iran is a founding member of the UN, NAM, OIC and OPEC. The political system of Iran, based on the 1979 constitution, comprises several intricately connected governing bodies. The highest state authority is the Supreme Leader. Shia Islam is the official religion and Persian is the official language.