I’m hoping you meant “above the altar” or “near the altar” rather than “on” it. There should never be anything “on” the Altar, except during Mass.
Aside from that, if you have notified your priest of the documents, and have
politely made the request to have your parish conform with the discipline of the Church, and he still doesn’t see the need, then you have done your duty.
Offer the rest up to God, and be glad you have a priest who isn’t swayed into breaking his principles (even incorrect ones) on the say-so of a parishioner.
It might be worth mentioning it to the Bishop, but I imagine that the Bishop already knows, and has pastoral reasons for not disciplining the priest (or has tried, and has met with no results - you can never tell with these things. It’s not like you can fire a priest.)