At the entrance to Castelo Rodrigo, the Monastery of Santa Maria de Aguiar rises among chestnut trees, founded in 1174 by King Afonso Henriques and handed over to the Cistercian Order. From the sober church to the monks' quarters and the guesthouse loggia with its 1704 coat of arms, everything testifies to centuries of faith and hospitality for pilgrims to Santiago. Despite the damage caused by the French invasions and its abandonment in 1834, the monastery's former beauty remains intact.