You are fortunate. Our church, like most these days, has a wooden table for the altar. The old altar, candlesticks, and the rest were all junked, and the reredos was replaced with plywood rec-room paneling.
I think there were fresco designs on the walls, but they were all painted over with whitewash. Thank God the stained glass windows remain, but that's about the extent of it.
In my last church, while we were attending mass there, there was some talk of junking the stained glass windows and putting in clear glass. Fortunately the decision finally went against doing this, because the windows had been designed by Louis Tiffany, and the pastor was persuaded that they were too historically valuable to junk.
Get rid of aesthetics/beauty and replace it with the dull/boring/bland.
It is right out of the hippie movement.