Greater Iran or Greater Persia, also called the Iranosphere or the Persosphere, is an expression that denotes a wide socio-cultural region comprising parts of West Asia, the Caucasus, Central Asia, South Asia, and East Asia —all of which have been impacted, to some degree, by the Iranian peoples and the Iranian languages. It is defined by having been long-ruled by the dynasties of various Iranian empires, under whom the local populaces gradually incorporated some degree of Iranian influence into their cultural and/or linguistic traditions; or alternatively as where a considerable number of Iranians settled to still maintain communities who patronize their respective cultures, geographically corresponding to the areas surrounding the Iranian plateau. It is referred to as the "Iranian Cultural Continent" by Encyclopædia Iranica.
An Ashrafi Coin of Nader Shah (r. 1736–1747), reverse:"Coined on gold the word of kingdom in the world, Nader of Greater Iran and the world-conqueror king."
The Cyrus Cylinder, written in Babylonian cuneiform in the name of the Achaemenid king, Cyrus the Great, describes the Persian takeover of Babylon (An ancient city in modern-day Iraq).
Sassanian fortress in Derbent, Dagestan. Now inscribed on Russia's UNESCO world heritage list since 2003.
Painted clay and alabaster head of a Zoroastrian priest wearing a distinctive Bactrian-style headdress, Takhti-Sangin, Tajikistan, Greco-Bactrian kingdom, 3rd-2nd century BC.
Persian, also known by its endonym Farsi or Parsi, is a Western Iranian language belonging to the Iranian branch of the Indo-Iranian subdivision of the Indo-European languages. Persian is a pluricentric language predominantly spoken and used officially within Iran, Afghanistan, and Tajikistan in three mutually intelligible standard varieties, respectively Iranian Persian, Dari Persian, and Tajiki Persian. It is also spoken natively in the Tajik variety by a significant population within Uzbekistan, as well as within other regions with a Persianate history in the cultural sphere of Greater Iran. It is written officially within Iran and Afghanistan in the Persian alphabet, a derivative of the Arabic script, and within Tajikistan in the Tajik alphabet, a derivative of the Cyrillic script.
An Old Persian inscription written in Old Persian cuneiform in Persepolis, Iran
Middle Persian text written in Inscriptional Pahlavi on the Paikuli inscription from between 293 and 297. Slemani Museum, Iraqi Kurdistan.
Ferdowsi's Shahnameh
Kalilah va Dimna, an influential work in Persian literature