Ok, George. I'll play your game.
As a Catholic, I apologize for the massacre of Huguenots by Catholics 436 years ago and for the pope of the time's de facto justification for it.
I think John Paul II pretty much covered everything else.
Now your turn---or, if not you, ask the MP or the EP to do it. I'll be waiting...
(Update: "On the eve of the 24th of August we cannot forget the sad massacre of St. Bartholomew's Day, an event of very obscure causes in the political and religious history of France. . . Christians did things which the Gospel condemns. . .acknowledging the weaknesses of the past is an act of honesty and courage which helps us to strengthen our faith. . . I am convinced that only forgiveness, offered and received, leads little by little to a fruitful dialogue, which will in turn insure a fully Christian reconciliation." John Paul II, Aug. 24, 1997)