Abbas ibn Abd al-Muttalib in the context of "Sayyid"

The Abbasid Caliphate or Abbasid Empire was the third Islamic caliphate, founded by a descendant of Muhammad's uncle, Abbas ibn Abd al-Muttalib (566–653 CE), from whom the dynasty derives its name. The preceding Umayyad Caliphate was overthrown by the Abbasid Revolution in 750 CE (132 AH), after which the Abbasids ruled as caliphs from their base in Iraq, with Baghdad as their capital for most of their history.

The Abbasid Revolution had its origins and first successes in the easterly region of Khurasan, far from the Levantine center of Umayyad influence. The Abbasids first centered their government in Kufa, Iraq, but in 762 the second caliph al-Mansur founded the city of Baghdad and made it the capital. Baghdad became a center of science, culture, arts, and invention, ushering in what became known as the Golden Age of Islam. Baghdad housed several key academic institutions, such as the House of Wisdom, and along with its multi-ethnic and multi-religious population, made the city famous as a centre of learning across the world. The Abbasid period was marked by the use of bureaucrats in the government, including the vizier, as well as an in the ummah (Muslim community) and among the political elites.

The Abbasid dynasty, or Abbasids, (Arabic: بنو العباس, romanized: Banu al-ʿAbbās) was an Arab dynasty that ruled the third Islamic caliphate between 750 and 1258. They were from the Qurayshi Hashimid clan of Banu Abbas, descended from Abbas ibn Abd al-Muttalib. The Abbasid Caliphate is divided into three main periods: Early Abbasid era (750–861), Middle Abbasid era (861–936) and Later Abbasid era (936–1258). A cadet branch of the dynasty also ruled as ceremonial rulers for the Mamluk Sultanate (1261–1517) until their conquest by the Ottoman Empire.

The Abbasid Caliphate or Abbasid Empire (/əˈbæsɪd, ˈæbəsɪd/; Arabic: الْخِلَافَة الْعَبَّاسِيَّة, romanized: al-Khilāfa al-ʿAbbāsiyya) was the third Islamic caliphate, founded by a descendant of Muhammad's uncle, Abbas ibn Abd al-Muttalib (566–653 CE), from whom the Abbasid dynasty derives its name. The preceding Umayyad Caliphate was overthrown by the Abbasid Revolution in 750 CE (132 AH), after which the Abbasids ruled as caliphs from their base in Iraq, with Baghdad as their capital for most of their history.

The Abbasid Revolution had its origins and first successes in the easterly region of Khurasan, far from the Levantine center of Umayyad influence. The Abbasids first centered their government in Kufa, Iraq, but in 762 the second caliph al-Mansur founded the city of Baghdad and made it the capital. Baghdad became a center of science, culture, arts, and invention, ushering in what became known as the Golden Age of Islam. Baghdad housed several key academic institutions, such as the House of Wisdom, and along with its multi-ethnic and multi-religious population, made the city famous as a centre of learning across the world. The Abbasid period was marked by the use of bureaucrats in the government, including the vizier, as well as an in the ummah (Muslim community) and among the political elites.

Sharīf or Sherif (Arabic: شريف, 'noble', 'highborn'), also spelled shareef, feminine sharīfa (شريفة), plural ashrāf (أشراف), shurafāʾ (شرفاء), or (in the Maghreb) shurfāʾ, is a title used to designate a person descended, or claiming to be descended, from the family of the Islamic prophet Muhammad (c. 570 CE – 632 CE). It may be used in three senses:

1. In the broadest sense, it refers to any descendant of Muhammad's great-grandfather Hashim (the Banu Hashim or Hashimites, already in Muhammad's day an established clan within the Meccan tribe of the Quraysh), including all descendants of Muhammad's paternal uncles Abu Talib (the Talibids) and al-Abbas (the Abbasids).
2. More often, it refers to a descendant of Ali, a son of Abu Talib and a paternal cousin of Muhammad (the Alids), especially but not exclusively through Ali's marriage with Muhammad's daughter Fatima (the Fatimids). In the sense of descendants of Fatima and Ali (the most common one), the term effectively refers to all descendants of Muhammad.
3. In the narrowest sense, it refers only to someone who descends from Fatima and Ali's eldest son (and Muhammad's grandson) Hasan (the Hasanids). In this limited context, it is contrasted with the term sayyid ('lord', 'master', plural sāda, (سادة), which then refers only to the descendants of Hasan's younger brother Husayn (the Husaynids).

The precise usage of the term has varied both historically and geographically.

ʿAbd Allāh ibn ʿAbbās (Arabic: عَبْد ٱللَّٰه ٱبْن عَبَّاس; c. 619 – 687 CE), also known as Ibn ʿAbbās, was one of the cousins of the prophet Muhammad. He is considered to be the greatest mufassir of the Qur'an.

He was the son of Abbas ibn Abd al-Muttalib, an uncle of Muhammad, and a nephew of Maymunah bint al-Harith, who later became Muhammad's wife. During the early struggles for the caliphate he supported Ali, and was made governor of Basra. He withdrew to Mecca shortly afterwards. During the reign of Mu'awiya I he lived in Hejaz and often travelled to Damascus. After Mu'awiya I died in 680 CE he migrated to At-Ta'if, where he is resting from around 687 CE.