On April 30, a group of 19 Catholics released an open letter to the bishops of the world, accusing the pope of heresy and demanding that the college of bishops act to make him “adjure.”

According to the letter’s signers, which include a handful of prominent academics, Pope Francis has committed the canonical crime of heresy, which entails publicly and obstinately doubting or denying credenda teachings - those Catholics are required, according to canon law  “to believe with divine and Catholic faith.”