Vicar of Christ

noun2

1. •
   The Pope.

   • [I]n the spacious ceremonial library of the 16th century Apostolic Palace, the czar of world atheism, Mikhail Gorbachev, will visit the Vicar of Christ, Pope John Paul II. — 1989
2. •
   (rare) The Holy Ghost.

noun1

1. •
   Any bishop.

   • Bishops, as vicars and ambassadors of Christ, govern the particular churches entrusted to them by their counsel, exhortations, example, and even by their authority and sacred power... — 1964