Francis is a member of the Society of Jesus - the Jesuits.
The Jesuits have become famous over the centuries for education and their loyalty to the Pope.
The Pope
Only Pope Francis was a Jesuit who became pope.
We have a pope, Pope Francis, who happens to be a Jesuit. However, there is no Jesuit Pope. Some public media sources often refer to the Superior General of the Jesuits as the "Black Pope" in reference to the black worn by priests of the order and the power that has been wielded by the Jesuits in the past. However, the Catholic Church has only one true Pope who wears white and that is currently (2015) Pope Francis.
Jesuits
Pope Francis is a member of the Society of Jesus - the Jesuits. He is the first Jesuit to be elected as pope.
Pope Francis is a member of the Society of Jesus - the Jesuits. He is the first Jesuit to be elected as pope.
Black Pope is a title give by some to the Father General of the Jesuit Order of priests. He is called the Black Pope because the color of the clothing worn by the Jesuits is black while that of the pope is white. He is in charge of supervising and directing the Society of Jesus. By the way, the term "Black Pope" is not used by the Jesuits themeselves.
The Superior General of the Jesuits is sometimes given the derogatory nickname of the Black Pope after his simple black vestments, as contrasted to the white garb of the pope. The pope, of course, is the leader of the entire Catholic Church while the Superior General of the Jesuits is in charge of the Jesuit order of priests only and is subject to the pope has his 'boss.'
The Jesuits take the normal vows of poverty, chastity and obedience. They also make a fourth vow of special obedience to the Pope.
He joined the Society of Jesus - the Jesuits.