 The Augustinian credentials of Martin Luther did not prevent anti-clerical attacks on the order during the Reformation, and neither did it enhance the order's political influence within the Catholic Church during the Counter-Reformation.A number of mathematicians, astronomers, and musicians are also found among the members of the order, but it was the great scientist Johann Gregor Mendel, abbot of the Czech monastery of St. Thomas at Old Brno in Moravia (d. 1884) who gave great credit to the Augustinian Order's scholarship in the 19th century.He was the discoverer of the Mendelian laws of heredity and hybridization.