Yaqut al-Hamawi's 'Mu'jam al-Buldan' (Dictionary of Countries) is an monumental work of medieval Islamic geography, a comprehensive encyclopedic dictionary detailing places, regions, and cities across the known world from the perspective of the 13th century. Beyond mere geographical coordinates, al-Hamawi meticulously weaves in historical narratives, cultural insights, literary references, and biographical information related to each location. It serves as an invaluable primary source for historians, geographers, and scholars of Islamic civilization, offering an unparalleled glimpse into the political, social, and intellectual landscape of the medieval Middle East and beyond. Its meticulous detail and broad scope make it an indispensable reference for understanding the historical geography of the Islamic world.