Diego de Estella () was a 16th-century Spanish Franciscan mystic and theologian, born 1524 in Estella, Navarra, died 1578 in Salamanca. His secular name was Diego Ballesteros y Cruzas. Works Libro de la vanidad del mundo (1562) Tratado de la vida de San Juan (1554) Tratado de la vanidad del mundo (second edition) (1574) Meditaciones dévotisimas del amor de Dios (1578). He was the author of a book on Saint Luke that was outlawed by the Spanish Inquisition. References 1524 births 1578 deaths People from Navarre 16th-century Spanish Roman Catholic theologians Spanish Franciscans 16th-century Christian mystics Roman Catholic mystics