| Lists of religious leaders by century: |
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This is a list of the top-level leaders for religious groups with at least 50,000 adherents, and that led anytime from January 1, 1301, to December 31, 1400. It should likewise only name leaders listed on other articles and lists.
Musta'li Isma'ilism is a branch of Isma'ilism named for their acceptance of al-Musta'li as the legitimate ninth Fatimid caliph and legitimate successor to his father, al-Mustansir Billah. In contrast, the Nizari—the other living branch of Ismailism, presently led by Aga Khan IV—believe the ninth caliph was al-Musta'li's elder brother, Nizar.
The Sulaymani branch of Tayyibi Isma'ilism is an Islamic community, of which around 70,000 members reside in Yemen, while a few thousand Sulaymani Bohras can be found in India. The Sulaymanis are sometimes headed by a Da'i al-Mutlaq from the Makrami family.
Idris Imad al-Din ibn al-Hasan al-Qurashi was the 19th Da'i al-Mutlaq of Tayyibi Isma'ilis from 1428 to 1468. A major religious and political leader in 15th-century Yemen, as well as a notable theologian, Idris was also an important medieval Isma'ili historian whose work is fundamental for the history of the Fatimid Caliphate and the Isma'ili communities in Yemen.
Abbas ibn Muhammad was the 15th Da'i al-Mutlaq of Tayyibi. He succeeded the 14th Dai Syedna Abdul Muttalib to the religious post and was the 10th Dai from the lineage of al-Waleed.
The Metropolis of Halych was a metropolis of the Ecumenical Patriarchate of Constantinople in the Eastern Orthodox Church. It was erected on the territory of the Kingdom of Galicia–Volhynia in 1303 by Patriarch Athanasius I of Constantinople. The episcopal seat of the metropolis was in the city of Halych in the "Cathedral of the Assumption".
Ibrahim ibn al-Husayn ibn Ali ibn Muhammad ibn al-Walid was the eleventh Tayyibi Isma'ili Da'i al-Mutlaq in Yemen, from 1287 to his death in 1328.
