Ali Haydar Pasha (1835–1927) was a prominent Ottoman jurist and minister of justice. His monumental four-volume work, "Durar al-Hukkam Sharh Majallat al-Ahkam," is an exhaustive commentary on the *Majallat al-Ahkam al-Adliyya*, the Ottoman civil code. This code, rooted in Hanafi fiqh, represented a landmark effort to codify Islamic law into a modern legal framework. Haydar's commentary systematically elucidates each article, exploring its jurisprudential underpinnings, practical application, and comparative perspectives. It remains an indispensable resource for understanding Ottoman legal history and the evolution of civil law in the Islamic world.