Castle of los duques de Alburquerque Monument · Cuéllar, Tierra de Pinares, Segovia Castle-palace of the Dukes of Alburquerque, declared a Monumento Nacional (Spain's heritage designation in force until 1931) in 1931, in which the Gothic design of the fortress coexists with a Renaissance gallery opened onto the courtyard, testimony to its conversion into a seigneurial residence. Photo: María López Cuéllar (CC BY-SA 4.0) What to see and do in Cuéllar