I just bought a new laptop. Thinking that it would be nice to have a library image for my desktop wallpaper I searched for what I believe to be one of the most magnificent Baroque libraries in the world: The Strahov Monastery Library. The two images have very high resolution, so you can resize it for any desktop resolution you might have. Use the "save photo" link that pops up on the right when you move the mouse over the picture. You can also search the same site for "Strahov" pictures.