It is one of the locations of the St. James' Northern Way (Ruta del Besaya). Since 2017, the municipality has been included in the Geopark of Las Loras,[3] the first UNESCO Geopark in Castile and León.
In May 1255 Alfonso X the Wise granted Aguilar a royal fuero,[4] and thus the town also became a realengo ('royal demesne').[5] The town maintained that status until 1332. The town featured a seizeable Jewish community in the middle ages.[6]
Gullón and Fontaneda opened biscuit factories in 1904 and 1913, respectively, and the town acquired a reputation as a renowned biscuit-making centre in Spain in the 20th century.[7]
In medieval times, Aguilar de Campoo was home to a Jewish community. The earliest documentation of Jews in Aguilar de Campoo dates to 1187. The Jewish community was decimated after the 1492 expulsion of the Jews. Over the Reinosa Gate, one of the gates of the city, is an inscription of Judeo-Castilian (Castilian language written in Hebrew letters) detailing who built the gate.[8]
