Centuries-old graffiti showing Viking-style longboats carved into the side of a church on a remote island is at risk of being worn away by the elements, campaigners have warned.
The images, carved about 800 years ago on the walls of Kilchattan Old Parish Church on the Isle of Luing, are exposed to the wind and rain.
They remain a mystery to historians. Some claim the drawings show the fleet of the 13th-century Scottish King Alexander II, while others say they depict the forces of King Haakon IV of Norway before the 1263 Battle of Largs.
The Scottish victory at Largs, called the Last Battle of the Vikings, was pivotal in ending Scandinavian control of the Hebrides.
Mary Braithwaite, of Luing History Group, told the BBC