celts used to live in the balkans as well and some offshoots made it into (or rather were deported to by greeks) anatolia, in galatia the celts used to inhabit all the british isles but their languages (and partially their genetics too, but to a much lesser extent) were pushed out by anglosaxons and remained only in ireland, as you said and scotland, wales, man island, once in cornwall too, while on mainland europe their languages survived only in brittany, nw france more celtic art mostly from france for reference    it has something rococo-esque which i can't quite put my finger on, very unique insofar as even later art forms in the broader niger delta did not replicate that style but were either more realistic like the ife heads
Italy