A Papal Constitution is a formal document issued by the Pope that outlines important principles and regulations for the governance of the Catholic Church. These constitutions can address various aspects of church life, including doctrine, administration, and the roles of clergy and laity. They serve as a guide for the Church's mission and operations. Typically, Papal Constitutions are part of the broader category of Church law known as Canon Law. They can also establish new institutions or modify existing ones within the Church. Notable examples include the Constitution on the Sacred Liturgy from the Second Vatican Council, which reformed liturgical practices.