Hidalguía universal del valle de Baztán Historical milestone · Baztan, Baztan-Bidasoa, Navarra Image of Baztan, not of the place itself. In 1397 King Charles III of Navarre declared that the inhabitants of the valley should be upheld in their status of 'fidalguía e infançonía', a universal hidalguía (petty nobility) that allowed any resident to bear the valley's black-and-white checkered coat of arms. Tradition attributes the design of the coat of arms — evoking the idea that war was, for them, a game of chess — to kings Sancho Abarca or Sancho VII el Fuerte after the Battle of Las Navas de Tolosa (1212). 1397 Photo: Gorkaazk (CC BY-SA 4.0) What to see and do in Baztan