Capo-D'Istria, John, Count of. A Greek who gained distinction as a diplomat. Born at Corfu in 1776. His father was a physician, and became governor of the seven Ionian islands when they were occupied by Russia. John, who had studied medicine at Venice, entered the service of Russia. In 1813, in consideration of his meritorious labors, the Emperor Alexander made him minister for foreign affairs. In 1827 he was made president of the new Greek government, where he fell by the hand of an assassin in 1831.