From Newgrange we went to Old Mellifont Abbey, which is basically an Abbey in ruin from the 12th century that is special because it’s the first that used the cross shaped chapel area (that they know of).
There was a tiny tiny visitor’s center with a little museum area talking about the architecture, and the history of the place. Basically it was built onto over hundreds of years before being abandoned after some battle in… the 1600s? Or thereabouts. So there’s lots of different kinds of architecture.
Yay ruins!