Horace Newton Allen (1858 - 1932), a Protestant, medical missionary from the United States, who later also served as a diplomat, made a remarkable impact on his mission country, Korea, where he arrived in 1884. He was the first Protestant missionary to work in the country. In 1885, he established Korea's first modern medical facility, Gwanghyewon, which has grown into the Yonsei University Severance Hospital and School of Medicine. In 1887, he accompanied Korea's first diplomatic delegation to Washington. He also wrote some of the first books introducing Korean culture to the western world.