Establishment and Umayyad period The first
dīwān was created under Caliph
Umar ( CE) in 15
A.H. (636/7 CE) or, more likely, 20 A.H. (641 CE). It comprised the names of the warriors of
Medina who participated in the
Muslim conquests and their families, and was intended to facilitate the payment of salary (
ʿaṭāʾ, in coin or in rations) to them, according to their service and their relationship to
Muhammad. This first army register (
dīwān al-jund) was soon emulated in other provincial capitals like
Basra,
Kufa and
Fustat.
Al-Mughira ibn Shu'ba, a statesman from the
Thaqif tribe who was versed in
Persian, is credited with establishing Basra's
dīwān during his governorship (636–638), and the
dīwān of the Caliphate's other garrison centers followed its organization. With the advent of the
Umayyad Caliphate, the number of
dīwāns increased. To the
dīwān al-jund, the first
Umayyad caliph,
Mu'awiya (r. 661–680), added the bureau of the land tax (
dīwān al-kharāj) in
Damascus, which became the main
dīwān, as well as the bureau of correspondence (
dīwān al-rasāʾil), which drafted the caliph's letters and official documents, and the bureau of the seal (
dīwān al-khātam), which checked and kept copies of all correspondence before sealing and dispatching it. A number of more specialist departments were also established, probably by Mu'awiya: the
dīwān al-barīd in charge of the
postal service; the bureau of expenditure (
dīwān al-nafaqāt), which most likely indicates the survival of a
Byzantine institution; the
dīwān al-ṣadaqa was a new foundation with the task of estimating the
zakāt and
ʿushr levies; the
dīwān al-mustaghallāt administered state property in cities; the
dīwān al-ṭirāz controlled the government workshops that made official banners, costumes and some furniture. Aside from the central government, there was a local branch of the
dīwān al-kharāj, the
dīwān al-jund and the
dīwān al-rasāʾil in every province. Under Caliph
Abd al-Malik (), the practices of the various departments began to be standardized and Arabized: instead of the local languages (
Greek in
Syria,
Coptic and Greek in
Egypt, Persian in the former
Sasanian lands) and the traditional practices of book-keeping, seals and time-keeping, only Arabic and the
Islamic calendar were to be used henceforth. The process of Arabization was gradual: in Iraq, the transition was carried out by
Salih ibn Abd al-Rahman under the auspices of the governor
al-Hajjaj ibn Yusuf in 697, in Syria by
Sulayman ibn Sa'd al-Khushani in 700, in Egypt under Caliph
al-Walid I's governor
Abdallah ibn Abd al-Malik in 706, and in
Khurasan by
Ishaq ibn Tulayq al-Nahshali on the orders of
Yusuf ibn Umar al-Thaqafi, governor of Iraq, in 741/42.
Abbasid period Under the
Abbasid Caliphate the administration, partly under the increasing influence of
Iranian culture, became more elaborate and complex. As part of this process, the
dīwāns increased in number and sophistication, reaching their apogee in the 9th–10th centuries. At the same time, the office of
vizier (
wazīr) was also created to coordinate government. The administrative history of the Abbasid
dīwāns is complex, since many were short-lived, temporary establishments for specific needs, while at times the sections of larger
dīwān might also be termed
dīwāns, and often a single individual was placed in charge of more than one department. Caliph
al-Saffah (r. 749–754) established a department for the confiscated properties of the Umayyads after his victory in the
Abbasid Revolution. This was probably the antecedent of the later
dīwān al-ḍiyāʿ, administering the caliph's personal domains. Similarly, under
al-Mansur (r. 754–775) there was a bureau of confiscations (
dīwān al-muṣādara), as well as a
dīwān al-aḥshām, probably in charge of palace service personnel, and a bureau of petitions to the Caliph (
dīwān al-riḳāʿ). Caliph
al-Mahdi (r. 775–785) created a parallel
dīwān al-zimām (control bureau) for every one of the existing
dīwāns, as well as a central control bureau (
zimām al-azimma). These acted as
comptrollers as well as coordinators between the various bureaus, or between individual
dīwāns and the vizier. In addition, a
dīwān al-maẓālim was created, staffed by judges, to hear complaints against government officials. The remit of the
dīwān al-kharāj now included all land taxes (
kharāj,
zakāt, and
jizya, both in money and in kind), while another department, the
dīwān al-ṣadaqa, dealt with assessing the
zakāt of cattle. The correspondence of the
dīwān al-kharāj was checked by another department, the
dīwān al-khātam. As in Umayyad times, miniature copies of the
dīwān al-kharāj, the
dīwān al-jund and the
dīwān al-rasāʾil existed in every province, but by the mid-9th century each province also maintained a branch of its
dīwān al-kharāj in the capital. The treasury department (
bayt al-māl or
dīwān al-sāmī) kept the records of revenue and expenditure, both in money and in kind, with specialized
dīwāns for each category of the latter (e.g. cereals, cloth, etc.). Its secretary had to mark all orders of payment to make them valid, and it drew up monthly and yearly balance sheets. The
dīwān al-jahbad̲ha, responsible for the treasury's balance sheets, was eventually branched off from it, while the treasury domains were placed under the
dīwān al-ḍiyāʿ, of which there appear at times to have been several. In addition, a department of confiscated property (
dīwān al-musādarīn) and confiscated estates (
dīwān al-ḍiyāʿ al-maqbūḍa) existed. Caliph
al-Mu'tadid (r. 892–902) grouped the branches of the provincial
dīwāns present in the capital into a new department, the
dīwān al-dār (bureau of the palace) or
dīwān al-dār al-kabīr (great bureau of the palace), where "
al-dār" probably meant the vizier's palace. At the same time, the various
zimām bureaux were combined into a single
dīwān al-zimām which re-checked all assessments, payments and receipts against its own records and, according to the 11th-century scholar
al-Mawardi, was the "guardian of the rights of
bayt al-māl [the treasury] and the people". The
dīwān al-nafaḳāt played a similar role with regards to expenses by the individual
dīwāns, but by the end of the 9th century its role was mostly restricted to the finances of the caliphal palace. Under
al-Muktafi (r. 902–908) the
dīwān al-dār was broken up into three departments, the bureaux of the eastern provinces (
dīwān al-mashriq), of the western provinces (
dīwān al-maghrib), and of the Iraq (
dīwān al-sawād), although under
al-Muqtadir (r. 908–932) the
dīwān al-dār still existed, with the three territorial departments considered sections of the latter. In 913/4, the vizier
Ali ibn Isa established a new department for charitable endowments (
dīwān al-birr), whose revenue went to the upkeep of holy places, the
two holy cities of
Mecca and
Medina, and on volunteers fighting in the holy war against the
Byzantine Empire. Under Caliph
al-Mutawakkil (r. 847–861), a bureau of servants and pages (
dīwān al-mawālī wa ’l-ghilmān), possibly an evolution of the
dīwān al-aḥshām, existed for the huge number of slaves and other attendants of the palace. In addition, the
dīwān al-khātam, now also known as the
dīwān al-sirr (bureau of confidential affairs) grew in importance.
Miskawayh also mentions the existence of a
dīwān al-ḥaram, which supervised the women's quarters of the palace. ==Later Islamic dynasties==