Objectives: The study aimed to clarify the role of Al-Sayyid Al-Ajall and his family in the service of the Mongol Empire. They worked to develop its administrative and military institutions, benefiting from their extensive experience in administration, politics, economics, and urban affairs. Due to their capabilities, they received the patronage of Genghis Khan and subsequent generations, earning the confidence of the ruling Mongol authority. As a result, they were granted significant powers within the state. Methods: The study relied on the analytical method to analyze historical texts, compare them with others, and discuss them accurately. Results: The study yielded several results, including the minister's keen interest in implementing various reformist and urban projects throughout the country. These projects encompassed the construction of mosques, dams, bridges, markets, and more. Additionally, the minister played a significant role in organizing the state budget, showcasing his expertise and efficiency. Conclusions: The study concluded that Al-Sayyid Al-Ajall exerted every effort to achieve stability in the countries under his rule and promote justice among all. His profound impact on Mongol history and the regions they governed made him an exemplary figure. Additionally, Al-Sayyid Al-Ajall played a crucial role in the spread of Islam across various regions of China. Moreover, he undertook numerous construction projects, including the building of roads, markets, mosques, temples, dams, bridges, river excavation, and the establishment of shelters for orphans and the elderly.
