From mid 1950'th until his death in 1965 Poul Rytter did several very large wallpainting in schools and other public buildings in Jylland.
Many of these still exists while other for more or less understandable reasons have been removed. At least in one known case, Haderup school, because the teacher found it better for the pupils to look at a white wall in stead of the wall paintings.....
Take a look at the list here