Travel With Rick Steves - The Discovery of Middle Earth

The temples of the Celts all over Europe took a very particular shape. It looks like a rectangle that's being drawn by a child, or a person who can't draw straight. This seems to fit in with Roman propaganda. They didn't bother having a tidy square or rectangle. But actually, those rectangles are a particular shape that's produced when you draw an ellipse which is the shape of the sun's yearly course through the sky.