John of Shanghai and San Francisco was an Eastern Orthodox archbishop and monk who served various communities across Asia, Europe, and North America. Born Mikhail Maximovitch in the Russian Empire in 1896, he later led dioceses in Shanghai and Western Europe before settling in the United States. He is widely recognized for his intense asceticism, his dedication to refugee populations, and his extensive missionary work. Known as a wonderworker, he is venerated as a saint in both the Eastern Orthodox Church and the Catholic Church.