You say stupid, but I actually would find it sad to see beautiful buildings that are in many cases hundreds of years old defaced with loads of small condensers bolted on to the face.
That doesn't mean they shouldn't have A/C but rather all flats use one system with a large roof condenser, or where that is not possible district cooling or ground source.
That doesn't mean they shouldn't have A/C but rather all flats use one system with a large roof condenser, or where that is not possible district cooling or ground source.