Pope Gregory XI issues five papal bulls to denounce the doctrines of English theologian John Wycliffe.

Theology is the systematic study of the nature of the divine and, more broadly, of religious belief. It is taught as an academic discipline, typically in universities and seminaries. It occupies itself with the unique content of analyzing the supernatural, but also deals with religious epistemology, asks and seeks to answer the question of revelation. Revelation pertains to the acceptance of God, gods, or deities, as not only transcendent or above the natural world, but also willing and able to interact with the natural world and, in particular, to reveal themselves to humankind. While theology has turned into a secular field, religious adherents still consider theology to be a discipline that helps them live and understand concepts such as life and love and that helps them lead lives of obedience to the deities they follow or worship.

Theologians use various forms of analysis and argument (experiential, philosophical, ethnographic, historical, and others) to help understand, explain, test, critique, defend or promote any myriad of religious topics. As in philosophy of ethics and case law, arguments often assume the existence of previously resolved questions, and develop by making analogies from them to draw new inferences in new situations.

The study of theology may help a theologian more deeply understand their own religious tradition, another religious tradition, or it may enable them to explore the nature of divinity without reference to any specific tradition. Theology may be used to propagate, reform, or justify a religious tradition; or it may be used to compare, challenge (e.g. biblical criticism), or oppose (e.g. irreligion) a religious tradition or worldview. Theology might also help a theologian address some present situation or need through a religious tradition, or to explore possible ways of interpreting the world.

Pope Gregory XI (Latin: Gregorius, born Pierre Roger de Beaufort; c. 1329 – 27 March 1378) was head of the Catholic Church from 30 December 1370 to his death in 1378. He was the seventh and last Avignon pope and the most recent French pope recognized by the modern Catholic Church. In 1377, Gregory XI returned the Papal court to Rome, ending nearly 70 years of papal residency in Avignon, France. His death shortly after was followed by the Western Schism involving two Avignon-based antipopes.