Sentence:  Peter Caroli had come to Geneva , saying that he had been a <WSD>bishop</WSD> of the Church of Rome and had been persecuted in Paris for his Reformed faith . 
Meaning of the word marked with <WSD> tags:  a senior member of the Christian clergy having spiritual and administrative authority; appointed in Christian churches to oversee priests or ministers; considered in some churches to be successors of the twelve Apostles of Christ