Alamut (Persian: الموت, lit. 'Eagle's Nest') is a ruined mountain fortress located in the Alamut region in the South Caspian, near the village of Gazor Khan in Qazvin province in Iran, approximately 200 km (130 mi) from Tehran.
In 1090 AD, the Alamut Castle, a mountain fortress in Iran, came into the possession of Hassan-i Sabbah, a champion of the Nizari Ismaili cause. Until 1256, Alamut functioned as the headquarters of the Nizari Ismaili state, which included a series of strategic strongholds scattered throughout Persia and Syria, with each stronghold being surrounded by swathes of hostile territory.
Alamut, which is the most famous of these strongholds, was thought impregnable to any military attack and was fabled for its heavenly gardens, library, and laboratories where philosophers, scientists and theologians could debate in intellectual freedom.
The stronghold survived adversaries including the Seljuk and Khwarazmian empires. In 1256, Rukn al-Din Khurshah surrendered the fortress to the invading Mongols, who dismantled it and destroyed its famous library holdings. Though commonly assumed that the Mongol conquest obliterated the Nizari Ismailis presence at Alamut, the fortress was recaptured in 1275 by Nizari forces, demonstrating that while the destruction and damage to the Ismailis in that region was extensive, it was not the complete annihilation attempted by the Mongols. However, the castle was seized once again and fell under the rule of Hulegu Khan’s eldest son in 1282. Afterward, the castle was of only regional significance, passing through the hands of various local powers. Nowadays, it lies in ruins.
In July 2026, the Alamut Castle and Related Fortifications were inscribed on the UNESCO World Heritage List under criterion (iii), as a rare testimony to the cultural tradition of the Nizari Isma'ilis. The inscription covers Alamut Castle and six associated fortifications: Lambesar, Navizaršāh, Šams Kelāyeh, Qosṭinlār, Širkūh, and Ilān. The inscription followed more than two decades of archaeological research, conservation, and documentation in the Alamut region, in which Iranian archaeologist Hamideh Choubak played a leading role as the longtime supervisor of archaeological investigations at the site.
Origins and name
"Alamut" was the name of the castle until 1090, and afterwards it was called "Hassan Sabbah's Castle" (قلعه حسن صباح). According to local narrations, the castle was original named after the nearby village of Gazor Khan (Qasir Khan).
Popular local belief trace the foundation of the castle to the mythologicl Iranian king Keyumars, which maybe the result of confusion with a namesake Baduspanid ruler (r. 1395-1410) who briefly ruled over the castle.
The Alamut castle was built by the Justanid ruler of Daylam, Wahsūdān ibn Marzubān, a follower of Zaydi Shi'ism, around 840 AD. During a hunting trip, he witnessed a soaring eagle perch high on a rock. Realizing the tactical advantage of this location, he chose the site for the construction of a fortress, which was called Aluh āmū[kh]t (اله آموت) by the natives, likely meaning "Eagle's Teaching" or "Nest of Punishment". The abjad numerical value of this word is 483, which is the date of the castle's capture by Hassan-i Sabbah (483 AH = 1090/91 AD). Alamut remained under Justanid control until the arrival of the Isma'ili chief da’i (missionary) Hassan-i Sabbah to the castle in 1090 AD, marking the start of the Alamut period in Nizari Isma'ili history.
During the Ismaili period, the castle had nicknames at different times, such as the "Land of Good Fortune" (بلدة الاقبال, named after the unexpected failure of the first Seljuk siege), Dar-ul-Mulk-i Ism'ailiyan (دارالملک اسماعیلیان), Kursi-yi Daylam (کرسی دیلم), and the "Throne of Daylaman" (تخت دیلمان). The opponents used other nicknames, such as the "The House of Heretics in Rudbar of Alamut" (الحادخانۀ رودبار الموت Ilhad-khana-ye Rudbar-i Alamut) and the "Lock of Satan" (قفل ابلیس Qufl-i Ilbis).
List of Nizari Isma'ili rulers at Alamut (1090–1256)
- Hassan-i Sabbah (حسن صباح) (1050–1124)
- Kiya Buzurg-Ummid (کیا بزرگ امید) (1124–1138)
- Muhammad ibn Kiya Buzurg-Ummid (محمد بزرگ امید) (1138–1162)
- Ali al-Hadi ibn Nizar ibn al-Mustansir
- Muhammad (I) al-Muhtadi
- Hasan (I) al-Qahir
- Hasan (II) Ala Dhikrihi al-Salam (امام حسن علی ذکره السلام) (1162–1166)
- Nur al-Din Muhammad (II) (امام نور الدین محمد) (1166–1210)
- Jalal al-Din Hasan (III) (امام جلال الدین حسن) (1210–1221)
- Al al-Din Muhammad (III) (امام علاء الدین محمد) (1221–1255)
- Rukn al-Din Khurshah (امام رکن الدین خورشاه) (1255–1256)
History
Following his expulsion from Egypt over his support for Nizar ibn al-Mustansir, Hassan-i Sabbah found that his co-religionists, the Isma'ilis, were scattered throughout Persia, with a strong presence in the northern and eastern regions, particularly in Daylaman, Khorasan and Quhistan. The Ismailis and other occupied peoples of Iran held shared resentment for the ruling Seljuks, who had divided the country's farmland into iqtā’ (fiefs) and levied heavy taxes upon the citizens living therein. The Seljuq amirs (independent rulers) usually held full jurisdiction and control over the districts they administered. Meanwhile, Persian artisans, craftsmen and lower classes grew increasingly dissatisfied with the Seljuq policies and heavy taxes. Hassan too, was appalled by the political and economic oppression imposed by the Sunni Seljuq ruling class on Shi'i Muslims living across Iran.
Capture of Alamut
By 1090, the Seljuq vizier Nizam al-Mulk had already given orders for Hassan's arrest and therefore Hassan was living in hiding in the northern town of Qazvin, approximately 60 km from the Alamut castle. There, he made plans for the capture of the fortress, which was surrounded by a fertile valley whose inhabitants were mainly fellow Shi’i Muslims, the support of whom Hassan could easily gather for the revolt against the Seljuqs. The castle had never before been captured by military means and thus Hassan planned meticulously.
In the summer of 1090, Hassan set out from Qazvin towards Alamut on a mountainous route through Andej. He remained at Andej disguised as a schoolteacher named Dehkhoda until he was certain that a number of his supporters had settled directly below the castle in the village of Gazorkhan or had gained employment at the fortress itself. Still in disguise, Hassan made his way into the fortress, earning the trust and friendship of many of its soldiers. Careful not to attract the attention of the castle's Zaydi ‘Alid lord, Mahdi, Hassan began to attract prominent figures at Alamut to his mission. It has even been suggested that Mahdi's own deputy was a secret supporter of Hassan, waiting to demonstrate his loyalty on the day that Hassan would ultimately take the castle.
Earlier in the summer, Mahdi visited Qazvin, where he received strict orders from Nizam al-Mulk to find and arrest Hassan who was said to be hiding in the province of Daylaman. Upon his return to the Alamut fortress, Mahdi noticed several new servants and guards employed there. His deputy explained that illness had taken many of the castle's workers and it was fortunate that other labourers were found from the neighbouring villages. Worried about the associations of these workers, Mahdi ordered his deputy to arrest anyone with connections to the Ismailis.
Mahdi's suspicions were confirmed when Hassan finally approached the lord of the fortress, revealing his true identity and declared that the castle now belonged to him. Immediately, Mahdi called upon the guards to arrest and remove Hassan from the castle, only to find them prepared to follow Hassan's every command. Astounded, he realized he had been tricked and was allowed to exit the castle freely. Before leaving however, Mahdi was given a draft of 3000 gold dinars as payment for the fortress, payable by a Seljuq officer in service to the Isma'ili cause named Ra’is Muzaffar who honoured the payment in full. The Alamut fortress was captured from Mahdi and therefore from Seljuq control by Hassan and his supporters without resorting to any violence.
Construction and intellectual development
With Alamut now in his possession, Hassan swiftly embarked on a complete re-fortification of the complex. By enhancing the walls and structure of a series of storage facilities, the fortress was to act as a self-sustaining stronghold during major confrontations. The perimeters of the rooms were lined with limestone, so as to preserve provisions to be used in times of crisis. Indeed, when the Mongols invaded the fortress, Juvayni was astonished to see stored countless supplies in perfect condition to withstand a possible siege.
Next, Hassan took on the task of irrigating the surrounding villages of the Alamut valley. The land at valley's floor was arable land, allowing for the cultivation of dry crops including barley, wheat and rice. In order to make available the maximum amount of cultivable land, the ground was terraced under Hassan's direction.
The construction of Alamut's famous library likely occurred after Hassan's fortification of the castle and its surrounding valley. With its astronomical instruments and rare collection of works, the library attracted scholars and scientists of a variety of religious persuasions from around the world who visited it for many months at a time, hosted by the Isma'ilis. By and large the writings of the Persian Ismailis, both scientific and doctrinal, did not survive beyond the Alamut period. In addition to the rich literature they had already produced in Arabic, the relocation of the Ismaili center to Iran now prompted a surge in Persian Ismaili literature.
One of the earliest losses of the library came during the early years of the Imam Jalal al-Din Hasan’s leadership at Alamut. In keeping with his principles of bridging the gaping relations between the Persian Ismailis and the broader Sunni world, Imam Jalal al-Din Hasan invited a number of religious scholars from the town of Qazvin to visit the castle's library and burn any books they deemed heretical. However, it was not until under the direction of the Mongol ruler, Hulegu Khan, when the Mongols ascended to the fortress in December 1256, that the Alamut library was lost. With the permission of Hulegu, Juvayni explored the library and selected a few works he deemed worthy of salvaging, before the remainder was set aflame. His choice items included copies of the Qur'an, a number of astronomical instruments and treatises, and a number of Ismaili works. An anti-Ismaili, Ata-Malik Juvayni's personal leanings were the sole measure of heretical content of the library's doctrinal works. Thus, some of the richest treatises regarding the tenets of Ismaili faith were lost with his destruction of the library. From his tour and survey of the castle, Juvayni compiled a description of Alamut that he incorporated into his chronicle of the Mongol invasions, entitled Tarikh-i Jahangushay-i Juvaini ("The History of the World Conqueror").
Concealment and emergence: Imamat at Alamut
With the death of Hassan-i Sabbah in 1124, the Alamut fortress was now in the command of the da’i Kiya Buzurg Ummid, under whose direction Ismaili-Seljuq relations improved. However, this was not without a test of the strength of Buzurg Ummid's command, and consequently the Seljuks began an offensive in 1126 on the Isma'ili strongholds of Rudbar and Quhistan. Only after these assaults failed did the Seljuq sultan Ahmad Sanjar concede to recognise the independence of the Isma'ili territories.
Muhammad ibn Kiya Buzurg
Accordingly, Muḥammad succeeded Kiya Buzurg Ummid in 1138. Though they expected some resistance to his rule, the fragmented Seljuks were met with continued solidarity amongst the Ismailis, who remained unified under Muhammad's command. The early part of Muhammad's rule saw a continued low level of conflict, enabling the Nizaris to acquire and construct a number of fortresses in the Qumis and Rudbar regions, including the castles of Sa’adat-kuh, Mubarak-kuh, and Firuz-kuh.
Imam Hasan ‘ala Dhikrihi al-Salam
Taken by illness in 1162, Muhammad was succeeded by Hasan, who was then about thirty-five years of age. Only two years after his accession, the Imam Hasan, apparently conducted a ceremony known as qiyama (resurrection) at the grounds of the castle of Alamut, whereby the Imam would once again become visible to his community of followers in and outside of the Nizārī Ismā'īlī state. Given Juvayni's polemical aims, and the fact that he burned the Ismā'īlī libraries which may have offered much more reliable testimony about the history, scholars have been dubious about his narrative but are forced to rely on it given the absence of alternative sources. Fortunately, descriptions of this event are also preserved in Rashid al-Din’s narrative and recounted in the Haft Bab-i Abi Ishaq, an Ismaili book of the 15th century. However, these are either based on Juvayni, or don't go into great detail. No contemporary Ismaili account of the events has survived.
Ismaili version of the Alamut history
What little we know about the Imamate at Alamut is narrated to us by one of the greatest detractors of the Ismailis, Juvayni. A Sunni Muslim scholar, Juvayni was serving Mongol patrons. While he then could not openly celebrate the Mongol victories over other Muslim rulers, the Mongol victory over the Nizari Ismailis, who Juvayni considered heretics and “as vile as dogs” became the focus of his work about Mongol invasions.
According to the Ismaili version of the events, in the year following the death of the Imam-Caliph al-Mustansir, a qadi (judge) by the name of Abul Hasan Sa'idi travelled from Egypt to Alamut, taking with him Imam Nizar’s youngest son, who was known as al-Hadi.
Imam Nur al-Din Muhammad
Succeeding Hasan 'ala dhikri al-salam in 1166, was the Imam Nūr al-Dīn Muhammad II, who, like his father and the imams of the pre-Alamut period, openly declared himself to his followers.