Al-Mawardi's 'Al-Ahkam as-Sultaniyyah wa al-Wilayat ad-Diniyyah' is a seminal work in Islamic political thought and public administration. This book meticulously details the principles of Islamic governance, the duties and responsibilities of rulers, judges, and other state officials, as well as the roles of various religious institutions. Written by the renowned 11th-century Sunni jurist and scholar Abu al-Hasan al-Mawardi, it provides invaluable insights into the structure and function of the Abbasid Caliphate, offering timeless guidance on justice, administration, and the relationship between temporal power and religious authority, making it essential reading for students of Islamic law and history.