In the late 19th and early 20th centuries, a unique legal experiment unfolded in Egypt, Syria/Lebanon, and Tangier. These regions, under semi-colonial control, established mixed courts—judicial bodies that blended local and foreign legal traditions to handle disputes involving foreigners. Aya Bejermi investigates how these courts operated as early forms of supranational law, influencing later international legal systems, including the foundations of European legal integration. Her study explores key questions: How did mixed court rulings evolve? How did lawyers and judges navigate competing legal traditions? And did this legal order leave a lasting imprint on modern supranational institutions?