when you add something to stop a thing collapsing what should you do? Make it subtle (from a distance) and mark it, or build a redbrick pillar (such as at Ty Newydd) that everyone moans about?
The operative word in my previous post was 'unnecessarily'. When something has to be added to an object for reasons of conservation the addition should be apparent; if it isn't then the addition falls into the category of 'restoration' (or something even worse, as in the 1968 plaque at Silbury). There are stones at Knowth that would easily be considered as original if they weren't marked with OPW. As Knowth is one big circus attraction anyway it probably doesn't matter so much there.
