Castilians (Spanish: "castellanos") are a subgroup of Spaniards and the inhabitants of the historical region of Castile, in central Spain. The exact limits of this region are disputed, and the western parts of Castile and León (that is, the Region of León), Cantabria and La Rioja are often also included in the definition, but this is controversial for historical reasons and the strong sense of unique cultural identity of those regions. The province of Albacete is also often included but not always, as it was previously has part of the Region of Murcia.