Gaston I of Foix

Gaston I (1287–1315) succeeded his father Roger-Bernard III in 1302 as Count of Foix and Viscount of Béarn, ruling first under his mother Margaret's regency. In 1301 he had married Joan of Artois. He fought for France at Mons-en-Pévèle in 1304, but backed his towns against royal tax collectors, for which the crown briefly seized Foix.

In 1308 he warred on the Count of Armagnac against royal orders, was captured and jailed in Paris's Châtelet, and freed only for a ransom of thirty-six thousand livres. He later claimed Urgell without success. Returning from the Flemish wars, he died at Maubuisson Abbey near Pontoise.