0PPERT, Charles Etienne d' (op'-pert), French magistrate, born in Toulouse in 1749 ; died there in 1819. He was a judge in the parliament of Toulouse at the time of the French revolution, but emigrated to Spain in 1791, and through the influence of relatives in the service of Charles IV. obtained an appointment in the department of state at Lima. He remained in Peru till the restoration of Louis XVIII., when he returned to his native city. While he was in Lima he became interested in Peruvian antiquities and drew a plan of the temple of the Virgins of the Sun in Cuzco. He made also a particular study of the songs of the Peruvian Sappho, which in a Spanish translation are yet sung by the Indians in the mountains of the interior of Peru and Bolivia, and he translated into French several melodies on the Colqui-Cocha or silver lake. Having recovered a part of his estate during Napoleon's reign, he resigned his office, travelled for several years in the country, and formed a collection of Indian antiquities which is now in the museum of Toulouse. He published "Voyage au Cuzco" (Toulouse, 1816);" Les antiquites Peruviennes" (1817); "Histoire de la poesie Peruvienne sous la domination des Incas" (1819) ; "Yaravis, ou complaintes Indiennes" (1819); and other works.