It isn’t a matter of “was.” She is formally and officially apostate to the present hour.
For the sake of your soul, listen to the message I linked.
Two Former Priests Analyze Catholicism
http://www.youtube.com/watch?v=3aNksLa_LQM
A Catholic Priest Biblically Saved
http://www.youtube.com/watch?v=-VKiv3ZGAWo&feature=youtu.be
Oh that one is easy. Its when they declared Mary the queen of heaven copying the pagans. They have incorporated many pagan practices, beliefs, and vestments ever since.
When the Mormons used to come around I used to ask them the exact same question, surprise, surprise they could never answer it either.