County of Forcalquier

The earliest mention of a castle at Forcalquier dates to 1044, when it was in the possession of Fulk Bertrand, joint count of Provence.

When Fulk died in 1051 his lands were shared between his sons William Bertrand and Geoffrey II, who inherited Forcalquier.

She married Ermengol IV of Urgell and died in 1129, at a time when Provence was sharply disputed by the many persons who had inherited some title to it.

William III and his descendants, a cadet branch of the counts of Urgell, continued to rule Forcalquier until the end of the century, when the Treaty of Aix (1193) gave in marriage the last count's granddaughter, Garsenda of Sabran, to Alfonso, son of Alfonso II of Aragon and heir of the county of Provence.

Their marriage in July 1193, Alfonso's inheritance in 1196, and Garsenda's in 1209 united the two counties permanently.