Robert College, also called RC is an American high school in Istanbul, Turkey. It is the most prestigious, private high school in Turkey. The institution was founded by Cyrus Hamlin, with the financial help of Christopher Rhinelander Robert, in 1863 (during the Ottoman Empire). Robert College is also the first American educational institution founded outside the United States. It was founded as a boys' college for Christian minority of the empire. Later the girls section was opened as American College for Girls. Then the Muslims were allowed to be educated in the schools. Hüseyin Pektaş became the first Muslim boy to graduate from college. In 19th century, many additions were made to college including, middle school and high school.