Julian Cope presents Head Heritage

The exceptions , i.e. the classic major monument examples , alone should be enough to alert us to an interest

There is the regional variation whereby some areas, at some point , choose a "quarter " to orient their monuments towards ,and this can change over time in the same area .

What is clear though is that the vast majority face the part of the sky where the sun or moon will be seen sometime in the year . Admittedly that is a large percentage of the horizon , but the remaining percentage is much bigger than the tiny percentage of monuments that don't face the sun or moon .

There is also a significant percentage that face roughly east i.e. 60 - 120 degrees .