This year is the 40th anniversary of the opening of the Sydney Opera House, and to mark the occasion the ABC and the Sydney Opera House Trust have put together an interactive web site documenting the history of the structure:
The Opera House Project

Have a look at the Youtube video below for background on what the site has to offer, and how and why it was made:

or go direct to the Operahouseproject site below, (note that if you are running IE 10 you will get a message telling you to “upgrade” to a more modern version, like IE 9; it worked without problems for me in Chrome).

Coincidentally, I discovered on Colin Caprani’s site a video on the life and works of Peter Rice, who spent a significant part of his early career working on the design and construction of the Opera House roof structures in London and Sydney.