Quite a few historic monuments were being built with solar phenomena in mind; one example is, stone megaliths properly mark the summer or winter solstice (such as in Nabta Playa, Egypt; Mnajdra, Malta; and Stonehenge, England); Newgrange, a prehistoric human-created mount in Ireland, was built to detect the Wintertime solstice; https://edgarbjouz.jasperwiki.com/6039097/opstalverzekeringen_vergelijken_no_further_a_mystery