Answer:
Gregory XI Returning To Rome
Scott 614a (1977)
Encouraged by St. Catherine of Sienna and St. Bridget of Sweden, Pope Gregory XI returned the Papacy from Avignon France back to Rome in 1377. See the two articles cited below for further information about Avignon.

For Further Info See:
 • James C Hamilton A Visit To Avignon's 14th Century Papal Palace
Vatican Notes Volume 67, Issue 379, 2019, Page: 34-43
 • Joseph Lo Preiato The End Of The 'Babylonian Captivity', The Return Of The Papacy To Rome
Vatican Notes Volume 26, Issue 2 1977 Pages 3-5