Charter of Agüero Historical milestone · Buenavista de Valdavia, Vega-Valdavia, Palencia In 1224 King Fernando III and the local nobility signed the Fuero de Agüero, the founding charter of the settlement; the present name of Buenavista is not fixed until 1789, already in the twilight of the Ancien Régime. 1224 Photo: Valdavia (CC BY-SA 3.0) What to see and do in Buenavista de Valdavia