THE POPE"S PALACE AVIGNON early May, 1348 AD Elysium angels looked down on the sad, afflicted, desperate town of Avignon. Saints Jean, Laurent, Martial and the rest had witnessed wise counsel bestowed from the commanding towers of the Palace go unheeded. Patience tested, consumed. This was their day of atonement. Nemesis in her moment, the Furies" boundless punishment, Hera"s loathing of Zeus: all paled set against the apocalyptic pestilence that had devoured the wicked place. The people with houses not yet shut up stood in line since dawn before the carved stone portal of the Grand Audience. Restless, they awaited the ceremonial opening of its colossal iron-bound doors. In the beginning, the emergency law resulted in congregations increasing tenfold. But the clergy, too, were smitten wi