The Codex Martínez Compañón (c.1782–1785), is a manuscript edited in nine volumes by the bishop of Trujillo, Peru, made by Baltasar Jaime Martínez Compañón, containing 1,411 watercolours and 20 musical scores documenting life in his diocese. This work was sent to Charles IV of Spain, who included it in the Royal Library in 1803. The musical examples in the bishop's text were probably written out by Pedro José Solis, maestro de capilla of Trujillo Cathedral from 1781 to 1823.