There is a local tagger in Cork called Chippy who likes to tag awkward to reach spots like up high on buildings, usually with orange paint and very straight letters. You can see it around town all over if you keep an eye out.
The Peace Park (officially Bishop Lucy Park) is currently closed for redevelopment. There are barriers up around it that have some mockups of the redesigned park. I noticed the other day that someone has taken a marker and written “Chippy” on one of the buildings shown in the mockups, up high and out of reach, thus making it a more accurate depiction of what the city looks like (though they didn’t really match Chippy’s style).