{ "id": "epk5pbbfmm", "slug": "dia-kossoi", "title": "Dia Kossoi", "updated": "2026-10-25", "topic_path": [ { "id": "society", "label": "Society and history", "api_url": "https://www.edgepedia.org/api/v1/topics/society" }, { "id": "society.history", "label": "History and archaeology", "api_url": "https://www.edgepedia.org/api/v1/topics/society.history" }, { "id": "society.history.other", "label": "Other history", "api_url": "https://www.edgepedia.org/api/v1/topics/society.history.other" }, { "id": "society.history.other.africa", "label": "Sub-Saharan Africa and the Horn", "api_url": "https://www.edgepedia.org/api/v1/topics/society.history.other.africa" }, { "id": "society.history.other.africa.wsudan-empires", "label": "Western Sudan: Ghana, Mali, and Songhai (300 to 1591)", "api_url": "https://www.edgepedia.org/api/v1/topics/society.history.other.africa.wsudan-empires" }, { "id": "society.history.other.africa.wsudan-empires.songhai-empire-and-timbuktu", "label": "Songhai Empire and Timbuktu", "api_url": "https://www.edgepedia.org/api/v1/topics/society.history.other.africa.wsudan-empires.songhai-empire-and-timbuktu" } ], "geo": [ { "id": "geo.afr.t500.society.history.other.africa", "label": "Sub-Saharan Africa · 500 BC to AD 999: Sub-Saharan Africa and the Horn", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.afr.t500.society.history.other.africa", "path": [ { "id": "geo.afr", "label": "Sub-Saharan Africa", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.afr" }, { "id": "geo.afr.t500", "label": "Sub-Saharan Africa · 500 BC to AD 999", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.afr.t500" }, { "id": "geo.afr.t500.society", "label": "Society and history", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.afr.t500.society" }, { "id": "geo.afr.t500.society.history", "label": "History and archaeology", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.afr.t500.society.history" }, { "id": "geo.afr.t500.society.history.other", "label": "Other history", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.afr.t500.society.history.other" }, { "id": "geo.afr.t500.society.history.other.africa", "label": "Sub-Saharan Africa and the Horn", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.afr.t500.society.history.other.africa" } ] } ], "excerpt": "Dia Kossoi, also written Kossoy or Kusoy, was the fifteenth ruler of Songhai's Za dynasty and its first Muslim king, converting in the eleventh century.", "snippet": "Dia Kossoi, also written Kossoy or Kusoy, was the fifteenth ruler of Songhai's Za dynasty and its first Muslim king, converting in the eleventh century.", "node": "society.history.other.africa.wsudan-empires.songhai-empire-and-timbuktu", "markdown": "# Dia Kossoi\n\nDia Kossoi (also written Kossoy, Kusoy, or Kusay) was the fifteenth ruler of the Za (Dia) dynasty of the Songhai state on the Niger bend, and the first of its kings to convert to Islam, an event dated to the eleventh century.[1](https://erenow.org/postclassical/new-islamic-dynasties-chronological-genealogical-manual/60.php) His conversion made Islam the official religion of the royal court, while most of his subjects remained followers of traditional religions.[2](https://www.ebsco.com/research-starters/history/songhai-kingdom-converts-islam) • [3](https://www.africabib.org/rec.php?RID=191529354)\n\n| Key fact | Detail |\n|---|---|\n| Dynasty | Za (Dia) dynasty of Songhai, fifteenth ruler[1](https://erenow.org/postclassical/new-islamic-dynasties-chronological-genealogical-manual/60.php) • [3](https://www.africabib.org/rec.php?RID=191529354) |\n| Principal deed | First Muslim ruler of the Songhai kingdom, converted in the eleventh century[1](https://erenow.org/postclassical/new-islamic-dynasties-chronological-genealogical-manual/60.php) |\n| Capital | Moved from Kukiya to Gao in connection with his conversion[2](https://www.ebsco.com/research-starters/history/songhai-kingdom-converts-islam) • [3](https://www.africabib.org/rec.php?RID=191529354) |\n| Royal religion | Islam official for the court; the populace remained largely pagan[3](https://www.africabib.org/rec.php?RID=191529354) |\n| External tie | Received a sword, a shield, and a Qur'an from the caliph in Baghdad[2](https://www.ebsco.com/research-starters/history/songhai-kingdom-converts-islam) • [4](https://www.divinityatlas.com/cities/gao-mali) |\n\n## Accession and family\n\nThe chronicle tradition tells that Za Alayman killed a giant fish at the river's shore with an iron spear, after which the people pledged their oath of allegiance and made him their king.[5](http://siiasi.org/wp-content/uploads/2015/01/Chapter-1-A-List-of-the-Rulers-of-Songhay.pdf) \n\nDia Kossoi stood fifteenth in this line, according to the ruler lists preserved in the *Ta'rīkh al-Sūdān* of [Abd al-Rahman al-Sa'di](https://www.edgepedia.org/abd-al-rahman-al-sadi) and the *Ta'rīkh al-Fattāsh* of the family of Mahmud al-Kati.[1](https://erenow.org/postclassical/new-islamic-dynasties-chronological-genealogical-manual/60.php) [Tradition](https://www.edgepedia.org/tradition) holds that the first fourteen rulers, whose state was centered on Kukiya, lived in ignorance of Islam.[6](https://human.libretexts.org/Courses/Benedictine_University/World_History_Volume_1%3A_to_1500/04%3A_A_Global_Middle_Ages_12001500_CE/4.02%3A_States_and_Societies_in_Sub-Saharan_Africa/4.2.04%3A_The_People_of_the_Sahel)\n\n## Reign: policies and administration\n\nKossoi converted to Islam in 1010, strongly influenced by Muslim traders in Gao; al-Sa'di places the fifteenth ruler, Zuwa Kusoy, called Muslim Dam, \"the voluntary Muslim,\" in the eleventh century.[2](https://www.ebsco.com/research-starters/history/songhai-kingdom-converts-islam) • [1](https://erenow.org/postclassical/new-islamic-dynasties-chronological-genealogical-manual/60.php) Upon his conversion the royal capital was moved from Koukya (Kukiya) to Gao, and Gao became the royal capital of the kingdom.[2](https://www.ebsco.com/research-starters/history/songhai-kingdom-converts-islam) • [3](https://www.africabib.org/rec.php?RID=191529354) Gao, sometimes called Kawkaw, had been a trading center on the Niger since at least the early ninth century, when Arabic sources first mention a principality there.[1](https://erenow.org/postclassical/new-islamic-dynasties-chronological-genealogical-manual/60.php) • [2](https://www.ebsco.com/research-starters/history/songhai-kingdom-converts-islam)\n\nThe caliph of Baghdad provided the emblems of Kossoi's office, a sword, a shield, and a copy of the Qur'an, establishing an official link between the ruler of Gao and Islam.[2](https://www.ebsco.com/research-starters/history/songhai-kingdom-converts-islam) • [4](https://www.divinityatlas.com/cities/gao-mali) Kossoi made the hajj to Mecca, performed the five daily prayers, fasted during Ramadan, and erected mosques in his empire.[2](https://www.ebsco.com/research-starters/history/songhai-kingdom-converts-islam)\n\nHis religious policy was accommodation rather than compulsion. Unlike the king of Takrur, who made conversion mandatory for his subjects, Kossoi did not force Islam on his kingdom; most common people remained followers of traditional animist sects.[2](https://www.ebsco.com/research-starters/history/songhai-kingdom-converts-islam) Islam became the official royal religion while the mass of the populace stayed pagan and court ceremonial remained largely pagan, a balance between Islam and the indigenous Songhay religious structure that persisted long after him.[3](https://www.africabib.org/rec.php?RID=191529354) In the eleventh century Gao was divided into residential areas for Muslim and traditionalist populations that coexisted harmoniously, and court ceremonials retained pagan traditions through the transitional period.[2](https://www.ebsco.com/research-starters/history/songhai-kingdom-converts-islam) \n\n## Political influence\n\nKossoi's conversion set the religious character of the Songhay state for the following centuries.[3](https://www.africabib.org/rec.php?RID=191529354) The shift of the political focus of the kingdom from Kukiya to Gao also belongs to this period, and Gao remained the capital of the Songhai state thereafter.[6](https://human.libretexts.org/Courses/Benedictine_University/World_History_Volume_1%3A_to_1500/04%3A_A_Global_Middle_Ages_12001500_CE/4.02%3A_States_and_Societies_in_Sub-Saharan_Africa/4.2.04%3A_The_People_of_the_Sahel) • [4](https://www.divinityatlas.com/cities/gao-mali)\n\n## Historians' assessment\n\nThe traditional early-eleventh-century date for the Islamization of the Songhai rulers is contested. Modern scholars believe the Islamization occurred toward the end of the eleventh century, with the arrival of the Sanhaja Almoravids from Morocco.[6](https://human.libretexts.org/Courses/Benedictine_University/World_History_Volume_1%3A_to_1500/04%3A_A_Global_Middle_Ages_12001500_CE/4.02%3A_States_and_Societies_in_Sub-Saharan_Africa/4.2.04%3A_The_People_of_the_Sahel) The history of the Songhai kingdom before the Askia period (1464–1591), which includes the whole era of the [Za dynasty](https://www.edgepedia.org/za-dynasty), remains poorly served by written sources, and the period between the third and fifth Hijri centuries is one in which the kingdom's kings preserved its strength and prosperity.[7](https://search.mandumah.com/Record/768454) Scholarly debate on the political and ethnic history of medieval Gao, including whether its early direction was Mande or Songhay, continues in the Journal of African History.[8](https://www.cambridge.org/core/journals/journal-of-african-history/article/abs/from-mande-to-songhay-towards-a-political-and-ethnic-history-of-medieval-gao/1E7DD1700B680DB7696E909A3C59F489)\n\n## References\n\n1. [The Kings of Songhay – New Islamic Dynasties: A Chronological and Genealogical Manual](https://erenow.org/postclassical/new-islamic-dynasties-chronological-genealogical-manual/60.php)\n2. [Songhai Kingdom Converts to Islam | EBSCO Research Starters](https://www.ebsco.com/research-starters/history/songhai-kingdom-converts-islam)\n3. [Religion and state in the Songhay Empire, 1464–1591 (Hunwick, J.O., 1966) – AfricaBib](https://www.africabib.org/rec.php?RID=191529354)\n4. [Gao – Divinity Atlas](https://www.divinityatlas.com/cities/gao-mali)\n5. [Chapter 1: A List of the Rulers of Songhay](http://siiasi.org/wp-content/uploads/2015/01/Chapter-1-A-List-of-the-Rulers-of-Songhay.pdf)\n6. [The People of the Sahel – LibreTexts](https://human.libretexts.org/Courses/Benedictine_University/World_History_Volume_1%3A_to_1500/04%3A_A_Global_Middle_Ages_12001500_CE/4.02%3A_States_and_Societies_in_Sub-Saharan_Africa/4.2.04%3A_The_People_of_the_Sahel)\n7. [مملكة سونغاي في عهد أسرة زا (ديا) – Mandumah](https://search.mandumah.com/Record/768454)\n8. [From Mande to Songhay: Towards a Political and Ethnic History of Medieval Gao – Journal of African History](https://www.cambridge.org/core/journals/journal-of-african-history/article/abs/from-mande-to-songhay-towards-a-political-and-ethnic-history-of-medieval-gao/1E7DD1700B680DB7696E909A3C59F489)\n\n---\n*Topic: Encyclopedia › Society and history › History and archaeology › Other history › Sub-Saharan Africa and the Horn › Western Sudan: Ghana, Mali, and Songhai (300 to 1591) › Songhai Empire and Timbuktu*\n\n*Initially written Sep 24, 2026 · Edited: Oct 15, 2026; Oct 25, 2026*\n\n*Copyright 2026 EdgeChat AI, a subsidiary of Biostate AI.*\n\nLicense: Edgepedia Community License 1.0, https://www.edgepedia.org/edgepedia/license\n", "same_as": [], "url": "https://www.edgepedia.org/dia-kossoi", "markdown_url": "https://www.edgepedia.org/dia-kossoi.md", "license": { "name": "Edgepedia Community License 1.0", "url": "https://www.edgepedia.org/edgepedia/license", "summary": "Free with credit, commercial use included. AI training is open to everyone. For other uses, organizations over USD 100M in revenue or 100M monthly users license separately.", "spdx": "LicenseRef-Edgepedia-Community-1.0" }, "credit": "\"Dia Kossoi\", Edgepedia (EdgeChat), https://www.edgepedia.org/dia-kossoi. Edgepedia Community License 1.0.", "credit_md": "\"[Dia Kossoi](https://www.edgepedia.org/dia-kossoi)\", Edgepedia (EdgeChat), [https://www.edgepedia.org/dia-kossoi](https://www.edgepedia.org/dia-kossoi). [Edgepedia Community License 1.0](https://www.edgepedia.org/edgepedia/license).", "credit_html": "\"Dia Kossoi\", Edgepedia (EdgeChat), https://www.edgepedia.org/dia-kossoi. Edgepedia Community License 1.0.", "speakable": "Dia Kossoi, also written Kossoy or Kusoy, was the fifteenth ruler of Songhai's Za dynasty and its first Muslim king, converting in the eleventh century." }