This is the first study to examine the rise and fall of a medieval religious group, the Order of Apostles, that began with orthodox support but ended in the fires of heresy. Originating in 1260 in Parma the group was founded by Gerard Segarelli who believed that a life of apostolic poverty was the true path of Christian devotion. Segarelli was initially supported by the Church but as his cohort grew in number and fame he was charged with heresy...