The current Pope is Francis I. In Catholic teaching he is infallible in matters of faith and morals, which teaching only dates back about 150 years. He is the Head of the Catholic Church. His formal title is:

Vicar of Jesus Christ, Successor of the Prince of the Apostles, Supreme Pontiff of the Universal Church, Primate of Italy, Archbishop and Metropolitan of the Roman province, Sovereign of Vatican City-State, Servant of the Servants of God.

That thing about the Sovereign of the Vatican City-State means in Vatican City his word is LAW. Supreme Pontiff of the Universal Church means that what he says goes, no arguing.

The Catholic Church isn't a democracy. It's a theocracy or, if you will, a theocratic monarchy.