Melchisedech, a French traveller, born in Paris about 1620, died at Issy, Oct. 29, 1692. He early explored Europe, learned oriental languages, and in 1684 became keeper of the royal library, of which he published a catalogue in 1694. The gatherings of learned men at his house formed the nucleus of the future academy of sciences. In 1645 he was sent on an official mission to Genoa, and from 1652 to 1655 he was employed by the government in Rome. He published compilations of travels, including Relations de divers voyages curieux (2 vols, fob, Paris, 1663-72), and Recueil de voyages, comprising Marquette's Decouvertes dans l'Amerique Septentrionale (1681).
Jean De, a French traveller, nephew of the preceding, born in Paris, June 6, 1633, died at Miana, Armenia, Nov. 28, 1667. After travelling through Europe, he made two extensive journeys in Asia and Africa, and is said to have first introduced coffee into France. The narratives of his travels were collected under the title Voyages de M. Thevenot tant en Europe qu'en Asie et en Afrique (5 vols. 12mo, Paris, 1689), and were translated into English, German, and Dutch.