This robber-baron‘s offense had been nothing less than the years-long defiance of his every actual and potential liege — consequence of the wide scope of action available to feudal nobles before the ascendance of absolutism.
Jourdain was the younger son of a lord, but managed to inherit a good chunk of land and marry into more of it … giving him power well beyond his merely nominal aristocratic rank.
An unscrupulous operator could have a field day — or in Jourdain’s case, a field decade or two.
Joseph Klicklighter, “The Nobility of English Gascony: the case of Jourdain de l’Isle” in the Journal of Medieval History 13 (1987), pp. 327-342 documents Jourdain de l’Isle-Jourdain’s run of rapine in the “chaos and lawlessness” of 14th century Gascony.
He would occupy lands to extract official concessions, rip off the sailors and merchants crossing his territory, play English and French power off against one other (not neglecting to drag in the Avignonese pope John XXII, who had our crooked noble’s back as his kinsman), even rape, murder, and plunder outright. When forced to fight a judicial duel that turned out inconclusively, he peevishly razed a castle of his opponent.
“For years,” Klicklighter notes, “Jourdain de l’Isle was able to … pursue his wars and crimes and to flaunt ducal [English] and French authorities alike.”
Mind, he was hardly the only Gascon noble amok, but he seems to have been the most offensively undiplomatic of the lot. When the new French King Charles IV** sent armed envoys to summon him (along with other lords) to Paris, Jourdain had the envoys beheaded.
At last someone prevailed upon our man to make the trip, and despite arriving “in grand array and with great arrogance,” the French clapped him in prison with what we can only assume was relief. The Pope’s frantic appeals on Jourdain’s behalf didn’t do him any good: in fact, our man was hanged in a garment derisively sporting the papal insignia.
Though this date’s execution put an end to one man’s depravities, the violence attributable to his contumacious native region was just getting started. Fourteen years later, the next French monarch, Philip VI, went to put an end to this foolishness by definitively reclaiming Gascony for France … and triggered the Hundred Years War.
* Formally, Gascony was an English fief of the French crown. Functionally, that meant that whenever the English seneschal issued an edict, the local lords could ignore it by appealing to Parlement.
** Charles IV was the last ruler of the House of Capet … thanks in part to the dynasty-destroying Tour de Nesle scandal.