Source 1
One of Skara Brae's elaborate tombs was the Chambered Cairn, Maeshowe. Maeshowe is believed to be created around 2700 BCE and because of its majestic scale size and intricate architecture it is the most profound of Orkney's chambered cairns. It is presented as a grassy mound and has a diameter of about 30 meters and a height of 11 meters. Maeshowe was a tomb and human remains such as skeletons were found in it. Maeshowe is also famous for its midwinter sunset alignment. For a small amount of days every year the midwnter sun's final rays shine straight through Maeshowe's entryway to light up the back wall of the threshold.
Source 2
Carved stone balls were found on the site of Skara Brae. The balls were covered in symbols thought to be ‘runic writing’. These stone balls are very mysterious because no-one knows what their purpose was or their meaning to the people who lived there, although they are thought to be used in religious rituals. Because they have been especially carved these stone balls are thought to be very special and powerful, and carry lots of meaning to the community.
The people of Skara Brae left no religious records, therefore we cannot confirm what religion they believed in or practiced. Although judging from the effort the people of Skara Brae put into the creation of their tombs for the dead, we can gather the idea that the dead were quite important to the living and that some sort of ancestral worshipping took place. From the island's later residents we can infer that the inhabitants of Skara Brae did worship spirits and gods who controlled distinctive parts of their common lives. A spirit of the sea who caused the storms or a god that changed the seasons and caused a good harvest. The unknown carved stone balls of Skara Brae are still a mystery but the idea of religious ritual involvement seems the most likely scenario. The sun, moon and stars were suggested to play a role in the Skara Brae dwellers lives for astronomical reasons and because they aligned their monuments with the sun's rises and sets.