The history of the Orkney Islands dates back to human settlement in BC. It is thousands of years old, with evidence dating back to 8500 BC. Many people have lived on the islands, including Neolithic settlers, Picts, Vikings and Scots, and all have left an indelible mark on the landscape.

One of the most important sites is the neo-pastoral village of Skara Brae, a UNESCO World Heritage Site that sheds light on prehistoric life. Skara Brae was built around 3100 BC, before Stonehenge and the Great Pyramids of Giza, making it one of the oldest sites in Europe.
https://www.pakistantraveler.com/orkney-islands/