The Pope

The pope (from Latin: papa; from Greek: πάππας[1] (pappas),[2] an affectionate word for father) is the Bishop of Rome and, as such, is leader of the worldwide Catholic Church (that is, both the Latin Rite and the Eastern Catholic Churches in full communion with the Roman Pontiff). The current[3] office-holder is Pope Benedict XVI, who was elected in papal conclave on 19 April 2005.

http://en.wikipedia.org/wiki/Pope