The last independent king of this region founded the Bourbon line of French monarchs in 1572.
A civil war in this region between John II and Charles IV occurred in the 1450s. The concept of home-rule known as "fuero" was advanced in the Castillian conquest of this region. Sancho the Wise was a king of this region, which supplied the right flank at the Battle of Las Navas de Tolosa under Sancho the Strong. It was known as the Kingdom of Pamplona in its early days, and this kingdom's resident Berengaria was the wife of Richard the Lionhearted. The last independent king of this region founded the Bourbon line of French monarchs in 1572. For 10 points, name this region that was the home of a King of France who declared Paris "well worth a mass," Henry IV.
A civil war in this region between John II and Charles IV occurred in the 1450s.
{Navarre} [or Kingdom of Pamplona before read]