In his latest salvo to challenge Rome’s authority, the president of Germany’s bishops’ conference has said that any German Protestant who wishes to receive Holy Communion in a Catholic Church on Ökumenischen Kirchentag — a day of Christian unity in May — may do so. Last September, the Congregation for the Doctrine of the Faith sent a letter to Bishop Georg Bätzing explaining that doctrinal differences with Protestants are “still so weighty” that “mutual participation in the Lord’s Supper or the Eucharist” was not possible.