Bishop
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Bishop is a title for a rank in the clergy of a Christian Church. Usually, there are first priests, then there are bishops. In the Catholic church, the pope is chosen amongst all the bishops. According to Roman cathlic church law, this does not have to be the case; any male (unmarried, baptized) Christian that is judged fit for the office and that wants to become pope can become pope. However, the last pope who was not a bishop was Urban VI (elected 1378).
The pope is also the bishop of the city of Rome. All bishops are only accountable to the pope (or the patriarch in the orthodox church).
Usually a bishop can be identified by a special hat, called a mitre.
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