18 September 1809 September 18, 2015 Author: Staff The Royal Opera House in London opens. Famous Words of Inspiration..."The difference between the most dissimilar characters, between a philosopher and a common street porter, for example, seems to arise not so much from nature, as from habit, custom, and education." Adam Smith — Click here for more from Adam Smith Related posts: 6 October 1723 15 June 1752 28 March 1809 20 October 1973 10 May 1849 20 October 1973 15 September 1940 18 September 2001 18 September 14 18 September 1870 Categories: History Tags: 18 September, 1809