Historiography
The period has been called the "Babylonian captivity" of the popes. When and where this term originated is uncertain though may have sprung from Petrarch, who in a letter to a friend (1340–1353) written during his stay at Avignon, described Avignon of that time as the "Babylon of the west," referring to the worldly practices of the church hierarchy. The nickname is polemical, in that it refers to the claim by critics that the prosperity of the church at this time was accompanied by a profound compromise of the Papacy's spiritual integrity, especially in the alleged subordination of the powers of the Church to the ambitions of the French kings. As noted, the "captivity" of the popes at Avignon lasted about the same amount of time as the exile of the Jews in Babylon, making the analogy convenient and rhetorically potent. The Avignon papacy has been and is often today depicted as being totally dependent on the French kings, and sometimes as even being treacherous to its spiritual role and its heritage in Rome.
Almost a century and a half later, Protestant reformer Martin Luther wrote his treatise On the Babylonian Captivity of the Church (1520), but he claimed it had nothing to do with the Western Schism or papacy in Avignon.
Read more about this topic: Avignon Papacy