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Concept
Greater Khorasan
Summary
Greater Khorāsān, or Khorāsān (Xwarāsān; xoɾɒːˈsɒːn) is a historical eastern region in the Iranian Plateau between Western and Central Asia. The name Khorāsān is Persian (from Bactrian Miirosan) meaning "where the sun arrives from" or "the Eastern Province". The name was first given to the eastern province of Persia (Ancient Iran) during the Sasanian Empire and was used from the late Middle Ages in distinction to neighbouring Transoxiana. Greater Khorasan is today sometimes used to distinguish the larger historical region from the former Khorasan Province of Iran (1906–2004), which roughly encompassed the western portion of the historical Greater Khorasan.
Khorasan comprised the present territories of northeastern Iran, parts of Afghanistan and southern parts of Central Asia. The province was often subdivided into four quarters, such that Nishapur (present-day Iran), Marv (present-day Turkmenistan), Herat and Balkh (present-day Afghanistan) were the centers, respectively, of the westernmost, northernmost, central, and easternmost quarters. In a strict sense of the term, Khorasan stretched as far as the Amu Darya (Oxus) river. However, the name has often been used in a loose sense to include a wider region that included most of Transoxiana (encompassing Bukhara and Samarqand in present-day Uzbekistan), extended westward to the Caspian coast and to the Dasht-e Kavir southward to Sistan, and eastward to the Pamir Mountains.
Khorasan was first established as an administrative division in the 6th century (approximately after 520) by the Sasanians, during the reign of Kavad I (488-496) or Khosrow I (531-579), which comprised the eastern and northeastern part of the empire. The use of Bactrian Miirosan 'the east' as an administrative designation under Alkhan rulers in the same region is possibly the forerunner of the Sasanian administrative division of Khurasan, occurring after their takeover of Hephthalite territories south of the Oxus. The transformation of the term and its identification with a larger region is thus a development of the late Sasanian and early Islamic periods.
Official source
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