Nishapur was located on a plain surrounded by mountains and had both surface and underground channels (qanat) that supplied water to the city and nearby farms. It had a citadel (kuhandiz or qohandez), an intramural city (shahristán or šahrestān), and extramural suburbs (rabad or rabaz), in addition to an Aljama mosque, a government palace, and markets. The citadel stood on an artificial platform, constructed by the Samanids, a dynasty that carried out similar works in
Bukhara and
Samarkand. Nishapur was a major Iranian city located in
Khorasan and was a major crossroads on the
Silk Road. It served as the capital of several dynasties throughout its history and became one of eastern Iran’s principal urban centres. Under the
Samanids, Nishapur became a provincial capital and hub of trade and culture. During the
Seljuk period, the city rose to even greater prominence, often serving as a royal residence. In its prosperous eras, the city was noted for vibrant trade (silk, cotton textiles,
turquoise), skilled artisans, and intellectual activity. During the 11th to 13th centuries, shortly before the
Mongol conquest, Nishapur was one of the largest and most prosperous cities in the region, with a population estimated between 100,000 and 200,000.
Prelude between 1207 and 1225|alt=Map of Central Asian Mongol campaigns between 1216 and 1223. Swedish scholar Carl Fredrick Sverdrup interprets that the Mongol generals
Jebe,
Subutai and
Taghachar were sent to pursue the fleeing
Shah Mohammed II of Khwarazm in 1220, but after crossing the Amu Daria, Taghaqchar stayed behind in
Balkh. In May 1220 Jebe and Subutai arrived in Nishapur demanding provisions, which were delivered quickly, before they continued towards Tus to pursue the Shah. They left Nishapur on June, but in the following months, false rumors of Mongolian defeats led their city's inhabitants to rebel. The khagan then sent Taghaqchar to pacify Khorasan. He attacked enemy positions near Herat. This attack may have been a breach of the agreement between Nishapur’s inhabitants and Jebe and Subutai, although Taghaqchar did not attack the city directly. Following the fall of
Urgench in early 1221,
Genghis Khan split his forces to subdue the regions actively rebelling against the Mongols throughout Persia and Central Asia. hearing about the
successes of the Khwarazmian prince
Jalal al-Din Mangburni, Genghis Khan instructed his fourth son,
Tolui, to lead an army of 80,000 men to Khorasan, with the mission of destroying the remaining Khwarazmian strongholds, including
Merv,
Nishapur, and
Herat.
Nishapur's governor, Sharaf al-Din Amir Majlis, resolved to resist the Mongol advance, supported by local militias and a force of 12,000 archers stationed at each of the four city gates, totaling 48,000. ==Siege==