18 July 1870 July 18, 2015 Author: Staff The First Vatican Council hands down the dogma of papal infallibility. Famous Words of Inspiration..."He who knows how to flatter also knows how to slander." Napoleon Bonaparte — Click here for more from Napoleon Bonaparte Related posts: 1 November 1950 18 September 1870 30 March 1870 4 July 1569 18 July 1984 18 July 1955 18 July 1976 18 July 1389 8 July 1099 Categories: History Tags: 18 July, 1870