Kelburn Castle is the seat of the Earl of Glasgow. In 2007 experts told the owners of Kelburn Castle that its concrete facing would eventually need to be replaced to avoid further damage to the stonework. At the suggestion of his children, Lord Glasgow invited four Brazilian graffiti artists to paint the walls. Historic Scotland agreed to the project, on the basis that the graffiti would be removed when the castle was re-harled.
Watch a time-lapse video of how the castle got painted: