Christian clergy by type

thumb|A pastor with an open Bible on a stand

thumb|Jesus of Nazareth was an itinerant apocalyptic preacher in 1st-century Judea. A preacher is a person who delivers sermons or homilies on religious topics to an assembly of people. Less common are preachers who preach on the street, or those whose message is not necessarily religious, but who preach components such as a moral or social worldview or philosophy.

function of service in Christianity

thumb|The Poor Parson is described in Canterbury Tales: The Prologue, by Geoffrey Chaucer A parson is an ordained Christian person responsible for a small area, typically a parish. The term was formerly often used for some Anglican clergy and, more rarely, for ordained ministers in some other churches. It is no longer a formal term denoting a specific position within Anglicanism, but has some continued historical and colloquial use.

leader in the field of some Christian denominations

The Parabalani (Late Latin parabalānī, "persons who risk their lives as nurses", from ) or Parabolani (from or ) were the members of a brotherhood, who in early Christianity voluntarily undertook the care of the sick and the burial of the dead, knowing that they themselves could die.

wandering students or clerks, also known as ribaldi ("rascals"), as wandering scholars, or, after the early thirteenth century, as "goliardi" or "goliardenses"