William I of Provence

William I, known as the Liberator, was a prominent figure in the history of Provence, serving as Count from nine hundred sixty-eight until his abdication. Born around nine hundred fifty, he was the son of Boson II of Arles and Constance, who is speculated to be the daughter of Charles Constantine of Vienne. Alongside his elder brother Rotbold I, William held the title of comes or count, although it remains unclear whether they ruled jointly over the entirety of Provence or if their authority was divided.

In the year nine hundred eighty, William was appointed Count of Arles, further solidifying his influence in the region. His moniker, the Liberator, stems from his military successes against the Saracens, who had posed a persistent threat to Provence since establishing a base at Fraxinet. Notably, at the Battle of Tourtour in nine hundred seventy-three, he achieved a decisive victory with the support of the counts of the High Alps and the viscounts of Marseille and Fos, effectively driving the Saracens from Provence.

William's contributions extended beyond military endeavors; he reorganized the territory east of the Rhône, which he had received as a gift from King Conrad of Burgundy. With the bishop Isarn of Grenoble, he played a crucial role in repopulating Dauphiné and facilitated the settlement of an Italian count named Ugo Blavia near Fréjus in nine hundred seventy, aiming to restore agricultural productivity in the area. His legacy is noted in Ralph Glaber's chronicle, where he is referred to as dux, and he is recognized in a charter from nine hundred ninety-two as pater patriae.

In his later years, William chose to retire from public life, donating land to Cluny and becoming a monk. He passed away in Avignon and was interred in the church of Saint-Croix at Sarrians. Following his death, his brother succeeded him as margrave, but the great principality he had established began to wane as the castles of his vassals gradually transitioned into allods, diminishing the centralized control he had maintained.