Yeah, maybe but there are existing high crosses in Ireland dating back to the 6th century that are still in fairly good condition.
But of course they have been maintained.
Here are some photos of the historic ruins of Monasterboice en.wikipedia.org/wiki/Monasterboice It was founded in the late 5th century.
Here is a good site
These Celtic crosses show a cross over from Celtic pagan religion to Christianity.
For the transition from a pagan religion to Christianity to take place, the Catholic church used pre-existing festivals and symbols from the pagan religion.
So like in Poland you have Wianki which is the reminisce of a pre-Christian religion, so the Church renamed it St. John's day.
Same thing happened in Ireland, Halloween is from pre-Christian times.
What I find interesting is the symbolism used on the crosses at Monasterboice, i will continue this in a while