A modern classic from the 1920’s is the Stockholm Public Library by Gunnar Asplund – one of the great Swedish architects. It was built when the neo classicism was followed by the functionalism. Strict, airy, with a simple – yet majestic – elegance.
The photo is not by me – it is linked from DN – a Swedish newspaper.
This photo is from Wikipedia Commons and shows the simple and refined shape – the square and the circle. More photos and information can be found here.
Added: I’ve now taken photos of my own of the library which you can find in a later post here