Ambrosius EßerAmbrosius Eßer OP was a German church historian and member of the Dominican Order. He died of a pulmonary embolism.Eszer served for many years as professor at the Pontifical University of St. Thomas Aquinas, Angelicum in Rome, Italy.Honours 1987: Great Cross of Merit of the Federal Republic of Germany 1996: Austrian Cross of Honour for Science and Art, 1st class 2008: Grand Decoration of Honour in Silver for Services to the Republic of Austria 2008: Medal Pro Ecclesia et Pontifice