Corrected entry: When Bastian enters his school, it can be easily identified as a modern concrete building. But the attic where he reads the book is (or rather, should be) that of an older building (1950's or even older) - no modern edifice of that size would use old wooden rafters, walls and roofing.
Brian Katcher
22nd Apr 2004
Correction: This is purely an opinion. There is no evidence provided to corroborate it.
Also, the front of the building could be a more modern addition. A lot of older schools have entire new wings.
Brian Katcher