Castilblanco is a municipality located in the province of Badajoz, Extremadura, Spain. According to the 2005 census, the municipality …Castilblanco is a municipality located in the province of Badajoz, Extremadura, Spain. According to the 2005 census, the municipality has a population of 1146 inhabitants. There is no accord about the origins of the name of Castilblanco, but it is known that it is related to an ancient castle located where the San Cristóbal church is located nowadays. It is not known who built the castle. They could have been Arabs or Christians in the beginnings of 12th century, during the Reconquista. Many historians argue both that Castilblanco was a Templar enclave and that it would have been known as castillo blanco or castillo de los blancos because of the colour of the robe that the Templars wore.