Cyrus Hamlin (January 5, 1811 – August 8, 1900) was an American Congregational missionary and educator.
He left the United States in 1838 as a missionary under the American Board, arriving in Turkey in January 1839. In 1860, he began the work of establishing Robert College in Istanbul, Ottoman Empire. He served as its president until an unfortunate conflict in 1876, which forced his return to the United States where he served as professor of dogmatic theology at Bangor Theological Seminary. The books describes his live and experience during the years spent in Turkey.