The title "Bishop of Rome" is synonymous with the term "Pope", the leader of the Catholic Church. His authority extends throughout the world, and he serves as the highest-ranking member of the Church's hierarchy. Other synonymous titles for the Bishop of Rome include "Roman Pontiff", "Vicar of Christ", and "Supreme Pontiff". The term "Holy Father" is also often used to address the Pope directly. The Bishop of Rome's responsibilities include interpreting Church doctrine, providing guidance to Catholic communities worldwide, and overseeing the administration of various Church institutions. The Pope's authority extends beyond spiritual matters, with his influence often shaping political and social issues as well.