Seven popes reigned in Avignon from 1309 until 1377, followed by three renegade popes.
The last Pope to live in Avignon burned the city down because of perceived blasphemy by the populace. 
mnli hypothesis: The last Pope to live in Avignon burned the city down because of perceived blasphemy by the populace.  premise: Seven popes reigned in Avignon from 1309 until 1377, followed by three renegade popes.