graffiti a castle

In case you've not heard of this here's the link. Like many ancient monuments here the wrong mortar was used in renovations in the 1950s, causing damp to get in, so it all has to come off and be replaced with proper old-fashioned lime mortar. Until it does, in 2/3 years time, graffiti by these Brazilian artists will stay on the walls. The painting project will finish in early June.