The pope is the head of the Catholic Church. There is only one Catholic Church and it is not a sect. To be a Catholic Church, a church must be in union with the pope. If they are not in union with the pope, they are not Catholic.
The Roman Catholic Church
The pope is responsible for the Roman Catholic church.
The Pope is the official head of the Roman Catholic Church, so that is "his" church.
It was the Roman authorities that killed Jesus, not the Roman Catholic Church.
The Pope is head of the Roman Catholic Church.
The Vatican.
Pope
The pope was ahead of the Roman Catholic church.
The pope for Roman Catholics (Catholics who attend mass in the Latin rite), as well as for Catholics of the Byzantine Catholic Church, the Ethiopian Catholic Church, the Greek Catholic Church, the Maronite Catholic Church, the Assyrian Catholic Church, and many more, none of which celebrate the Roman rite, but all of which are in union with the Pope.
The Catholic Church has the pope as its leader.
The Catholic Church was the only church in the Middle Ages and the pope ruled the church and monarchies of Europe.