Before the French Revolution, Bigorre was made part of the gouvernement (military area) of Guienne-Gascony, whereas for general matters it depended from the généralité of Auch like the rest of Gascony (although for a certain period of time it depended from the généralité of Pau, like Béarn, Nébouzan, County of Foix, and the Basque provinces).
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In 1607, he united to the French crown those of his personal fiefs that were under French sovereignty (i.e. County of Foix, Bigorre, Quatre-Vallées, and Nébouzan, but not Béarn and Lower Navarre, which were sovereign countries outside of the kingdom of France), and so Bigorre became part of the royal domain.