A series of stonemason’s markings, thought to be over 600 years old, have been discovered by accident in Kirkwall’s St Magnus Cathedral, thanks to the installation of a modern lighting system in the ancient building.
The 12th-century Viking cathedral, situated in the heart of the Orkney capital, is the most northerly in Britain.
Dominating the Kirkwall skyline, the mediaeval building is a visible link to the Norse heritage of the islands and receives over 70,000 visitors a year.
Click here to see the video report from STV
Click here to read an article from The Scotsman