Travelers traveling between the Ariège and Querol valleys had to cross the Pimorent pass, where weather conditions, especially in winter, made the passage difficult. It is for this reason that during the second half of the 15th century, the French King Louis XI ordered the construction of a hospitality facility, where travelers could take refuge and receive the necessary attention before continuing on their way. Several houses were grouped around the Ospitalet near Andorra, which over time gave rise to the current small town, which still preserves that tradition of being a place of passage and resting place for travelers coming from Cerdanya or Andorra via Pas de la Casa.