Peñaranda de Duero is a village and municipio located in the province of Burgos, Castile and León, Spain. According to the 2004 census (INE), the municipality has a population of 583 inhabitants.The village is conserved as a conjunto histórico, a type of conservation area. Several buildings are additionally protected as monuments.Main sights Castle of Peñaranda de Duero (10th-15th century). Palace of the Counts of Miranda (16th century). Jimeno's family pharmacy (17th century). Collegiate church of St. Anne. Justice pillar.