It was Empress Theodora and Pope Sylvarius (sp) here is a link on New Advent.
http://www.newadvent.org/cathen/13793a.htm
Thank you! If you read further about Pope Vigilius, you will see he is the one of whom I spoke. He went to Rome with Theodora's blessing for the express purpose of supporting the monophysites and then, once in place as the Vicar of Christ, did not commit heresy.
He is a classic example of a papal succession full of intrigue and human frailty that did not compromise the faith--even when that was the purpose.