I've heard that there were two points of Catholic doctrine in Aquinas' Summa Theologica that were later successfully defended to the contrary. One, I think is the Immaculate Conception of Mary ...
I've read in a few places online (here, for example), that John Calvin did not have access to Thomas Aquinas's great treatise, Summa Theologica. This is mind-blowing. Consider: The last edition of ...