In case you missed it, my posts on "Calvin's 'P'" stirred up quite a flurry of discussion. Perseverance of the saints ("once saved, always saved"), Catholicism, transubstantiation, . . . the comments and interaction covered quite a bit of ground, and may not be over yet. Thanks to the contributors for their thoughtful replies and their courteousness to each other. You can learn a lot by reading what they wrote.
The orginal post is here (with 4 comments following). The second post - which engendered 27 comments so far - is here.
(The caption of the picture here isn't too ecumenical - sorry about that, Boethius! According to my loose translation, it says something like, "Johan Hus converted the Bohemians, and Luther taught the Germans. In like manner has this Calvin brought the faith to France; by doing so, he murdered the Antichrist, who, like the devil, won't be heard from again." If only.)