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Hasan ibn al-Hafiz

Hasan ibn al-Hafiz is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Hasan ibn al-Hafiz rather than just read about it. In short: Ḥasan ibn al-Ḥāfiẓ was a younger son of the eleventh Fatimid caliph and imam of Hafizi Isma'ilism, al-Hafiz, and vizier and heir-apparent of the Fatimid Caliphate from 19 July 1134 until his death in March 1135. Hasan came to power rebelling against his own father, and had allegedly espoused Sunnism.

Key takeaways

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  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Hasan ibn al-Hafiz to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Hasan ibn al-Hafiz from memory before moving on to harder problems.

Reference excerpt

Ḥasan ibn al-Ḥāfiẓ was a younger son of the eleventh Fatimid caliph and imam of Hafizi Isma'ilism, al-Hafiz, and vizier and heir-apparent of the Fatimid Caliphate from 19 July 1134 until his death in March 1135. Hasan came to power rebelling against his own father, and had allegedly espoused Sunnism. His reign was marked by brutality and repression which cost him support, and sparked another uprising that resulted in his downfall. He was poisoned by al-Hafiz, and succeeded by Bahram al-Armani.

Life

Origin Hasan was a younger son of the Fatimid caliph al-Hafiz (r. 1132–1149). The legitimacy of al-Hafiz' rule was challenged, as he had succeeded his cousin, al-Amir, in a coup. This led to a schism among the Isma'ili faithful, dividing them into the Hafizi and Tayyibi branches. In 1134, in an attempt to consolidate the line of succession, al-Hafiz appointed his eldest son, Sulayman, both as heir-apparent (wali ahd al-muslimin) and as vizier (head of government). It was the first time that a Fatimid prince, or even the heir-apparent, had been appointed to the vizierate. Sulayman died after only two months, once more calling into question the supposed infallibility of al-Hafiz as the Isma'ili imam, and thus his legitimacy. Sulayman's younger brother Haydara was immediately appointed as heir and vizier, but this provoked the jealousy of Hasan.

Uprising and vizierate Hasan won the backing of the Juyushiyya regiment, apparently recruited from Armenians, while al-Hafiz and Haydara were backed by the Black African regiment of the Rayhaniyya. The military factionalism appears to have had religious motivation as well, as Hasan and his followers are said to have backed Sunnism and to have attacked Isma'ili preachers. On 28 June 1134, the Juyushiyya defeated the Rayhaniyya, forcing Haydara to flee to the caliphal palace, which was now besieged by Hasan's troops. Faced with this unprecedented situation, al-Hafiz backed down and on 19 July, he appointed Hasan as vizier and heir. As the historian Michael Brett comments, al-Hafiz had effectively appointed his son "in opposition to himself". To secure his position, Hasan organized a private militia, the sibyan al-zarad, with which he terrorized the elites. Al-Hafiz instigated the Black African garrison of Upper Egypt to try and depose his son, but again Hasan's men emerged victorious. In the end, it was Hasan's tyrannical rule that caused his downfall. His brutal treatment of his enemies, the executions of prominent men and the confiscation of property, cost him whatever support he may have had. It was said that as many as 15,000 people were killed in the turmoils caused by Hasan's rule.

Downfall and death Following the murder of several senior commanders, the army rose in revolt in March 1135. Hasan fled to the caliphal palace, where al-Hafiz placed him under arrest. The troops then assembled at the square before the palace and demanded his execution, otherwise threatening to set fire to the palace. Al-Hafiz called to his rescue the governor of the Gharbiyya province (the western Nile Delta), Bahram al-Armani. Before Bahram could arrive in the capital, the Caliph submitted to the soldiers' demands and had his son poisoned by his Jewish physician. The troops did not disperse until one of them was invited in to inspect the body. For good measure, he stabbed it several times with a knife before departing.

References

Sources

Brett, Michael (2017). The Fatimid Empire. The Edinburgh History of the Islamic Empires. Edinburgh: Edinburgh University Press. ISBN 978-0-7486-4076-8. Daftary, Farhad (2007). The Ismāʿı̄lı̄s: Their History and Doctrines (Second ed.). Cambridge: Cambridge University Press. ISBN 978-0-521-61636-2. Güner, Ahmet (1997). "Hâfız-Lidînillâh". TDV Encyclopedia of Islam, Vol. 15 (Hades – Hanefî Mehmed) (in Turkish). Istanbul: Presidency of Religious Affairs, Centre for Islamic Studies. pp. 108–110. ISBN 978-975-389-442-5. Halm, Heinz (2014). Kalifen und Assassinen: Ägypten und der vordere Orient zur Zeit der ersten Kreuzzüge, 1074–1171 [Caliphs and Assassins: Egypt and the Near East at the Time of the First Crusades, 1074–1171] (in German). Munich: C. H. Beck. doi:10.17104/9783406661648-1. ISBN 978-3-406-66163-1. Magued, A. M. (1971). "al-Ḥāfiẓ". In Lewis, B.; Ménage, V. L.; Pellat, Ch. & Schacht, J. (eds.). The Encyclopaedia of Islam, Second Edition. Volume III: H–Iram. Leiden: E. J. Brill. pp. 54–55. doi:10.1163/1573-3912_islam_SIM_2612. OCLC 495469525.

Worked examples

Example 1 — a first encounter with Hasan ibn al-Hafiz

Start with the simplest possible case. Write down what Hasan ibn al-Hafiz claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Hasan ibn al-Hafiz before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Hasan ibn al-Hafiz ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Hasan ibn al-Hafiz

In research
Hasan ibn al-Hafiz appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Hasan ibn al-Hafiz in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Hasan ibn al-Hafiz is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1135 deaths, 12th-century people from the Fatimid Caliphate, Converts to Sunni Islam from Shia Islam, so understanding it makes those chapters shorter.
In everyday life
Look for Hasan ibn al-Hafiz outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.
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How to study Hasan ibn al-Hafiz in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Hasan ibn al-Hafiz means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Hasan ibn al-Hafiz out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Hasan ibn al-Hafiz in simple terms?

Ḥasan ibn al-Ḥāfiẓ was a younger son of the eleventh Fatimid caliph and imam of Hafizi Isma'ilism, al-Hafiz, and vizier and heir-apparent of the Fatimid Caliphate from 19 July 1134 until his death in March 1135. Hasan came to power rebelling against his own father, and had allegedly espoused Sunnis…

Why does Hasan ibn al-Hafiz matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Hasan ibn al-Hafiz?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Hasan ibn al-Hafiz.

Tags

  • 1135 deaths
  • 12th-century people from the Fatimid Caliphate
  • Converts to Sunni Islam from Shia Islam
  • Deaths by poisoning
  • Heirs apparent who never acceded
  • Rebellions against the Fatimid Caliphate
  • Sons of Fatimid caliphs
  • Viziers of the Fatimid Caliphate

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