In the early 1250s Mongke Khan, grandson and successor of the mighty Mongol emperor, Genghis Khan, sent out his youngerbrothers Qubilai and Hulegu to consolidate his grip on power. Hulegu was welcomed into Iran while his older brother, Qubilai, continued to erode the power of the Song emperors of southern China. In 1276 he finally forced their submission and peacefully occupied their capital, Hangzhou. The city enjoyed a revival as the cultural capital of a united China and was soon filled with traders, adventurers, artists, entrepreneurs, and artisans from throughout the great Mongol Empire includinga prosperous, influential and seemingly welcome community of Persians. In 1281, one of their number, Al al-Din, built thePhoenix Mosque in the heart of the city where it still stands today. This study of the mosque and the Ju-jing Yuan cemetery,today as a lake-side public park, casts light on an important and transformative period in Chinese history, and perhaps themost important period in Chinese Islamic history. The book is published in the Persian Studies Series of the British Instituteof Persian Studies.