The small collegiate church contains several curious relics associated with Roland. The battle is said to have been fought in the valley known as Valcarlos, which is now occupied by a hamlet bearing the same name, and in the adjoining pass of Ibañeta (Roncevaux Pass). Both of these are traversed by the main road leading north from Roncesvalles to Saint-Jean-Pied-de-Port, in the French Basque Country.