Razavi Khorasan Province

Razavi Khorasan (in Persian: خراسان رضوی) is a province located in northeastern Iran. Mashhad is the centre and capital of the province.
Other cities and townships are Ghouchan, Dargaz, Chenaran, Sarakhs, Fariman, Torbat-e Heydarieh, Torbat-e Jam, Taybad, Khaf, Roshtkhar, Kashmar, Bardaskan, Neyshabour, Sabzevar, Gonabad, Kalat, Khalil Abad and Mahvalat.Razavi Khorasan is one of the three provinces that were created after the division of Khorasan in 2004.

History
Greater Khorasan has witnessed the rise and fall of many dynasties and governments in its territory throughout history. Various tribes of the Arabs, Turks, Mongols, Turkemen and Afghans brought changes to the region time and time again.
Ancient geographers of Iran divided Iran ("Iran-Shahr") into eight segments of which the most flourishing and largest was the territory of Greater Khorasan.
The earlies known evidence for Lower Paleolithic occupation of Iran comes from Kashafrud basin at east of Mashad.The famous Parthian empire was based near Merv in Khorasan for many years.
During the Sassanid dynasty the province was governed by an Espahbod (Lieutenant General) called "Padgoosban" and four margraves, each commander of one of the four parts of the province.
Khorassan was divided into four parts during the Islamic Conquest of Iran and each section was named after the four large cities, such as Neyshabour, Merv, Herat, and Balkh.
In the year 651 CE, the army of Islamic Arabs invaded Khorasan. The territory remained in the hands of the Abbasid clan until 820 CE, followed by the rule of the Iranian Taherid clan in the year 896 CE and the Samanid dynasty in 900 CE.
Sultan Mohmud Qaznavi conquered Khorasan in 994 CE and in the year 1037 CE Toqrol, the first of the Seljuqian rulers conquered Neyshabour.
Mahmud Qaznavi retaliated against the invaders several times, and finally the Qaznavi Turks defeated Sultan Sanjar. But there was more to come, as in 1157 CE Khorasan was conquered by The Khwarazmids and because of simultaneous attacks by the Mongols, Khorasan was annexed to the territories of the Mongol Ilkhanate.
In the 14th century, a flag of independence was hoisted by the Sarbedaran movement in Sabzevar, and in 1468 CE, Khorasan came into the hands of Amir Teimoor Goorkani (Tamerlane) and the city of Herat was declared as capital.
In 1507 CE, Khorassan was occupied by Uzbek tribes. After the death of Nadir Shah Afshar in 1747 CE, Khorasan was occupied by the Afghans.
During the Qajar period, Britain supported the Afghans to protect their East India Company. Herat was thus separated from Persia, and Nasereddin Shah was unable to defeat The British to take back Herat. Finally, the Paris Treaty was concluded in 1903 and Iran was compelled not to challenge The British for Herat and other parts of what is today Afghanistan.
Finally Khorasan was divided into two parts: the eastern part, which was the most densely populated region came under British occupation, and the western section remained part of Iran.
Khorasan was the largest province of Iran until it was divided to three provinces on September 29, 2004. The provinces approved by the parliament of Iran (on May 18, 2004) and the Council of Guardians (on May 29, 2004) were Razavi Khorasan, North Khorasan, and South Khorasan.