20 October 1973 October 19, 2012 Author: Staff The Sydney Opera House is opened. Famous Words of Inspiration..."A loving heart is the beginning of all knowledge." Thomas Carlyle — Click here for more from Thomas Carlyle Related posts: 6 October 1973 8 March 1983 30 March 1981 11 August 1984 20 October 1967 Categories: History Tags: 1973, 20 October