Notre Dame’s Architecture Library slide collection has been made available on Flickr — more than 2,700 photographs. The images are from a pre-WWI collection, and include buildings in Europe, Asia and Central and South America. No Wright (in fact, no US) but worth a look.
The ones from Greece are amazing, especially the photos of the Acropolis and Parthenon (here you can still see one of the Frankish towers). Look at this one — you can see where I used to live in background. And this one kinda freaks me out.
The world really needs a good history of architecture blog. One of you should get cracking on that.