ḤASAN ṢABBĀḤ, prominent Ismaʿili dāʿi (q.v.) and founder of the medieval Nezāri Ismaʿili state (b. Qom, mid-440s/1050s, d. Alamut, 518/1124). Little information is available on the early life of Ḥasan Ṣabbāḥ, who was referred to as Sayyednā (our master) by his contemporary Nezāri Ismaʿilis. The colorful story, accord-ing to which Ḥasan, Neẓām-al-Molk, and ʿOmar Ḵayyām had made a pact when they were classmates in their youth under the same master at Nišābur, should be dismissed as a legend (see Rašid-al-Din, pp. 110-12; Kā-šāni, pp. 146-48; Mirḵᵛānd [Tehran], IV, pp. 199-204; Bowen, 1931, pp. 771-82). The events of Ḥasan’s career as the first ruler of Alamut (q.v.) are better documented; these events were recorded in the Sargoḏašt-e Sayyednā, the first part of which may have been autobiographical. Although this chronicle, which marked the initiation of a Nezāri tradition of historiography in Persia during the Alamut period, has not survived, it was used extensively by Jovayni, Rašid-al-Din, and Abu’l-Qāsem Kāšāni, who are the chief authorities on Ḥasan’s life and career (see Daftary, 1992, pp. 91-97).

Ḥasan Ṣabbāḥ was born in Qom into a Twelver Shiʿite family. His father, ʿAli b. Moḥammad b. Jaʿfar al-Ṣabbāḥ al-Ḥemyari, a Kufan claiming Ḥemyari Yemenite origins, had migrated from Kufa to Qom. Subsequently, the Ṣabbāḥ family settled down in Ray, where the youthful Ḥasan received his early religious education (in the Twelver Shiʿite tradition). It was at Ray, a center of Is-maʿili activities since the middle of the 3rd/9th century, that Ḥasan was introduced to their teachings by Amira Żarrāb, a local Ismaʿili dāʿi. Later, Ḥasan learnt more about Ismaʿili doctrines from Abu Naṣr Sarrāj and other dāʿis in Ray, and consequently, after having just turned seventeen, Ḥasan converted to Ismaʿilism and took the oath of allegiance (ʿahd) to the Ismaʿili imam of the time, the Fatimid Caliph al-Mostanṣer (427-87/1036-94).

In Ramażān 464/May-June 1072, the newly initiated Ḥasan managed to impress ʿAbd-al-Malek b. ʿAṭṭāš, the chief Ismaʿili dāʿi in the Saljuq territories, to such an extent that he appointed him to a position in the daʿwa (mission) organization. In 467/1074-75, Ḥasan accompanied Ebn ʿAṭṭāš to Isfahan, the secret headquarters of the Ismaʿili daʿwa in Persia, where he stayed until 469/1076-77, when, on instructions from Ebn ʿAṭṭāš, he left for Cairo to further his Ismaʿili education. Ḥasan reached Egypt in Ṣafar 471/August 1078 and spent three years there, first in Cairo and then in Alexandria, before returning to Isfahan. Almost nothing is known about Ḥasan’s experiences in Egypt. According to the lost Nezāri chronicles used by Persian historians, while in Egypt he clashed with the Fatimid vizier Badr-al-Jamāli, who at that time had just succeeded al-Moʾayyad fi’l-Din Ši-rāzi as the chief dāʿi (dāʿi al-doʿāt). Whether or not this conflict revolved around Ḥasan’s support for Nezār, al-Mostanṣer’s heir-designate, who was eventually deprived of succession to the Fatimid caliphate by Badr al-Jamāli’s own son and successor al-Afżal, Ḥasan was eventually banished from Egypt on Badr’s instructions. He returned to Isfahan in Ḏu’l-ḥejja 473/June 1081.

Ḥasan’s subsequent travels over several years in the service of the daʿwa and to evaluate the military strength of the Saljuqs were limited to different localities in Persia. It was during this period that he formulated his own revolutionary strategy against the Saljuqs. By around 480/1087, Ḥasan was concentrating his efforts on the region of Deylam, which was a stronghold of Shiʿism remote from the centers of Saljuq control. He targeted for his headquarters the fortress of Alamut, located in the central Alborz mountains of the Rudbār region. Ḥasan, who soon became the dāʿi of Deylam, reinvigorated the daʿwa activities in northern Persia and finally seized Alamut in 483/1090 by a clever plan of infiltration. This signaled the commencement of the Persian Ismaʿilis’ open revolt against the Saljuqs and also effectively marked the foundation of what was to become the Nezāri Ismaʿili state of Persia. Ḥasan made the fortress impregnable, and improved the cultivation and irrigation systems of the Alamut valley to make it self-sufficient in food production. Similar policies were later implemented in connection with other major Ismaʿili strongholds. Ḥasan also established an important library at Alamut, whose collections of manuscripts and scientific instruments had grown to impressive proportions by the time the Mongols destroyed the fortress in 654/1256.

Ḥasan Ṣabbāḥ seems to have had a complex set of religio-political motives for his revolt against the Saljuqs. As an Ismaʿili Shiʿite, he could not have tolerated the ardently Sunni Saljuq Turks’ attacks on Shiʿism and their aim to uproot the Fatimid caliphate. Ḥasan’s revolt was perhaps also an expression of the Persians’ resentment of the Saljuq Turks, since they accounted for a large proportion of the early popular support he received. Ḥa-san himself is reported to have said that the Turks were jinn and not men, descendants of Adam (Ivanow, 1933, p. 30 [Haft bāb-e Bābā Sayyednā]; Rašid-al-Din, p. 112; Kāšāni, p. 148). It was also as an assertion of his ethnic identity that, in spite of his Islamic piety, Ḥasan took the unprecedented step of replacing Arabic with Persian as the religious language of the Ismaʿilis of Persia.

After firmly establishing himself at Alamut, Ḥasan extended his influence in the region by winning more converts, taking over more strongholds in Rudbār, and building new fortresses wherever he found a suitable location. Alamut was soon raided by the forces of the nearest Saljuq emir, marking the initiation of an endless series of Saljuq-Ismaʿili military clashes. In 484/1091, Ḥasan sent the dāʿi Ḥosayn Qāʾeni to his native land in southeastern Khorasan to mobilize support there. The early success of the Ismaʿilis of Qohestān soon erupted into a popular uprising seeking independence from the oppressive Saljuqs. The Ismaʿilis thus seized control of several towns in Qohestān, which became another region, along with Rudbār, for their activities. In this way, in less than two years after the capture of Alamut, Ḥasan Ṣabbāḥ had founded an independent territorial state for the Persian Ismaʿilis in the midst of the Saljuq sultanate.

In 485/1092, major Saljuq expeditions were dispatched against the Ismaʿilis in both Rudbār and Qohestān, but these operations came to a halt later in the same year on the assassination of the all-powerful Saljuq vizier Neẓām-al-Molk, followed by Sultan Malek-šāh’s death a few weeks later. Taking advantage of the prolonged disorder and the rivalries in the Saljuq camp after Malek-šāh’s demise, Ḥasan consolidated and extended his power in Rudbār, where he seized the strategically located fortress of Lammasar (Lanbasar) to the west of Alamut. The Persian Ismaʿilis now also captured a number of strongholds, including Gerdkuh (q.v.), near Dāmḡān, as well as in Arrajān (q.v.), the border region between Ḵuzestān and Fārs.

By this time, the revolt of the Persian Ismaʿilis against the Saljuqs had already acquired its distinctive pattern and methods of struggle designed by Ḥasan himself; in view of the decentralized nature of political and military power in the Saljuq sultanate, Ḥasan’s plan was to uproot the Turks one by one from their separate strongholds by sending instructions from Alamut to his followers in each locality. He is famed for his decision to use assassination as an effective technique of struggle against the decentralized Saljuq opposition with its vastly superior military strength. This policy soon became identified with the Nezāri Ismaʿilis in an exaggerated manner, even though it had been adopted by many before them as well as their contemporaries. The actual Nezāri assassinations of their prominent enemies were carried out by their fedāʾis (q.v.; self-sacrificing devotees), and they were countered by massacres of Ismaʿilis.

The dispute over the succession to the Fatimid Caliph-Imam al-Mostanṣer, who died in 487/1094, led to a permanent schism, splitting the Ismaʿilis into rival Nezāri and Mostaʿli factions. Ḥasan Ṣabbāḥ, who was by then the undisputed leader of the Persian Ismaʿilis and had already adopted an independent policy, supported the cause of Nezār, al-Mostanṣer’s eldest son and designated successor, who had nonetheless been denied the Fatimid caliphate. Recognizing Nezār as his father’s successor to the Ismaʿili Imamate, Ḥasan now severed his ties with the Fatimid regime and the Ismaʿili daʿwa headquarters in Cairo, which had transferred their own allegiance to Nezār’s younger brother, appointing him to the Fatimid caliphate with the title of al-Mostaʿli. Ḥasan Ṣabbāḥ had now in effect founded an independent Nezāri Ismaʿili daʿwa, and his decision to support Nezār’s cause was endorsed by all the Ismaʿilis of Persia and Iraq, who came to be known as the Nezāriya.

From the early years of the 6th/12th century, Ḥasan began to send dāʿis from Alamut to Syria to propagate the Nezāri daʿwa. As a result of the activities of these dāʿis an expanding Nezāri community soon emerged in Syria which eventually became the sole representation of Is-maʿilis there. However, almost half a century of continuous efforts were needed before the Nezāris could gain possession of a group of permanent strongholds in central Syria, which then amounted to a subsidiary of the Nezāri state in Persia.

After Nezār was killed in Cairo in 488/1095, the Nezāri Ismaʿilis were left without an accessible Imam. Indeed, Nezār’s own name and caliphal title (al-Moṣṭafā le-Din-Allāh) continued to be mentioned for almost seventy years after his death on coins struck at Alamut (see Miles, 1972, pp. 155-62). In the absence of a manifest Imam, Ḥasan himself served as the supreme head of the Nezāri daʿwa and state, with the rank of ḥojja (chief representative of the hidden Imam). The Nezāri Imam was to return some four decades after Ḥasan’s own death (see Ivanow, 1933 [Haft bāb-e Bābā Sayyednā], p. 21; Ṭusi, 1950, text p. 148, tr. p. 173; Qohestāni, 1959, text pp. 23, 43).

Outsiders from early on gained the impression that the movement of the Persian Ismaʿilis led by Ḥasan Ṣabbāḥ represented a new teaching, and it became designated as the “new preaching” (al-daʿwa al-jadida) in contradistinction to the “old preaching” (al-daʿwa al-qadima) of the Fatimid Ismaʿilis. However, the “new preaching” was no more than the reformulation of the established Shiʿite doctrine of taʿlim (authoritative instruction). This doctrine was restated more vigorously by Ḥasan in a Persian treatise entitled Čahār faṣl, “The Four Chapters” (Ara-bic: al-Foṣul al-arbaʿa), which, although not extant, has been preserved fragmentarily by, amongst others, his contemporary Abu’l-Fatḥ Šahrestāni (d. 548/1153), who may have been a crypto-Ismaʿili (see Šahrestāni, 1968, II, pp. 195-98; idem, 1984, pp. 165, 167-70; Joveyni, 1912-37, III, pp. 195-99; idem, 1958, II, pp. 671-73; Rašid-al-Din, pp. 105-7; Kāšāni, pp. 142-43). In a series of four propositions Ḥasan argued for the inadequacy of human reason in knowing God and for the necessity of an authoritative teacher (moʿallem-e ṣādeq) as the spiritual guide of men, who would be none other than the Ismaʿili Imam of the time. Henceforth, the Persian Nezāris became known also as the Taʿlimiya. The anti-Ismaʿili polemics of the contemporary Sunni establishment, led by Moḥammad Ḡazāli and endorsed by Neẓām-al-Molk, were focused directly against this doctrine of taʿlim, which served as the central teaching of the Nezāri Ismaʿilis.

The fortunes of the Persian Ismaʿilis continued to rise in Barkyāroq’s reign (487-98/1094-1105), when they achieved new gains closer to the seat of Saljuq power in Isfahan, seizing the fortress of Šāhdez, also known as Dezkuh (q.v.). Having grown weary of the general threat of the Ismaʿilis to Saljuq rule, Barkyāroq and Sanjar now agreed to check, in their respective territories, the rising power of the Ismaʿilis. This strategy was more effectively pursued, however, by Moḥammad Tapar (498-511/1105-18) who, in 503/1109, initiated a major and prolonged campaign against Alamut itself. Ḥasan’s defense of Alamut during this period amazed the Saljuqs, who failed to take the fortress by assault or attrition despite their superior military power. By the time of Moḥam-mad Tapar’s death, Saljuq-Ismaʿili relations had entered a new phase of stalemate, with the Persian Ismaʿilis successfully defending important territories, including mountain strongholds, villages, and towns in Rudbār, Qohestān, and Kumeš (Arabic: Qumes). Although Ḥasan Ṣabbāḥ had failed to uproot the Saljuqs, he did succeed in founding both a state and the independent Nezāri Ismaʿili daʿwa, which survived the downfall of the Nezāri state.

An organizer and a political strategist of the highest caliber, Ḥasan Ṣabbāḥ was at the same time a trained theologian. He led an austere life and is said to have observed the šariʿa very strictly himself as well as imposing it on his Nezāri community: equally strict with friend and foe, he had both his sons executed, one for alleged murder, the other on suspicion of drinking wine. He is also said to have sent his wife and daughters away permanently to Gerdkuh, where they were forced to earn a living by spinning. The Persian historians relate that during all the thirty-four years that Ḥasan lived at Alamut he never descended from the castle. Rašid-al-Din (pp. 133-34) reports that he spent most of his time inside his personal quarters reading books, committing the teachings of the daʿwa to writing, and administering the affairs of his realm.

When he sensed that he was reaching the end of his life, Ḥasan summoned Kiā Bozorg-Omid, his capable lieutenant at Lammasar, and designated him as his successor in Alamut. Heá died, after a brief illness, on 26 Rabiʿ II 518/12 June 1124 (or possibly twenty days earlier), and was buried near Alamut. Ḥasan Ṣabbāḥ’s mausoleum was regularly visited as a shrine by the Nezāri Ismaʿilis until it was demolished by the Mongols in 654/1256.


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Ebn al-Aṯir, al-Taʾriḵ al-kāmel, Cairo, 1303/1885, IX, pp. 266-73, 311-12, 358, 384-85; X, pp. 161-62, 216, 217, 299-302, 369-70.

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Abu’l-Qāsem ʿAbd-Allāh b. ʿAli Kāšāni, Zobdat al-tawāriḵ: baḵš-e Fāṭemiān va Nezāriān, ed. M. T. Dānešpažuh, 2nd ed., Tehran, 1366 Š./1987, pp. 133-72, 186-90.

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Moḥammad b. ʿAli al-Rāwandi, Rāḥat al-ṣodur, ed. M. Eqbāl, London, 1921, pp. 155-62.

Abu ʾl-Fatḥ Šahrestāni, Kitāb al-melal wa’l-neḥal, ed. ʿA. M. al-Wakil, Cairo, 1968, II, pp. 195-98.

Idem, Muslim Sects and Divisions, tr. A. K. Kazi and J. G. Flynn, London, 1984.

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Farhad Daftary, The Ismāʿilis: their History and Doctrines, Cambridge, 1990, pp. 324-71, 669-81 (citing further references).

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Idem, “Persian Historiography of the Early Nizāri Ismāʿilis,” Iran 30, 1992, pp. 91-97.

Idem, “Ḥasan-i Ṣabbāḥ and the Origins of the Nizāri Ismaʿili Movement,” in F. Daftary, ed., Mediaeval Ismaʿili History and Thought, Cambridge, 1996, pp. 181-204.

Carole Hillenbrand, “The Power Struggle between the Sal-juqs and the Ismaʿilis of Alamut, 487-518/1094-1124: the Saljuq Perspective,” in F. Daftary, ed., Mediaeval Ismaʿili History and Thought, Cambridge, 1996, pp. 205-20.

Marshall G. S. Hodgson, The Order of Assassins, The Hague, 1955, pp. 41-98.

Idem, “The Ismāʿili State,” in Camb. Hist. Iran, IV, pp. 424-49.

Wladimir Ivanow, ed., Two Early Ismaili Treatises, Bombay, 1933.

Bernard Lewis, The Assassins: A Radical Sect in Islam, London, 1967, pp. 38-63, 145-52.

Wilferd Madelung, Religious Trends in early Islamic Iran, Albany, N.Y., 1988, pp. 9-12, 101-3.

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Ismail K. Poonawala, Biobibliography of Ismāʿili Literature, Malibu, Calif., 1977, pp. 251-54.

(Farhad Daftary)

Originally Published: December 15, 2003

Last Updated: March 20, 2012

This article is available in print.
Vol. XII, Fasc. 1, pp. 34-37

Cite this entry:

Farhad Daftary, “ḤASAN ṢABBĀḤ,” Encyclopaedia Iranica, XII/1, pp. 34-37, available online at http://www.iranicaonline.org/articles/hasan-sabbah (accessed on 30 December 2012).