New Castile is a historic region of Spain. It roughly corresponds to the medieval Moorish Taifa of Toledo, taken during the Reconquista of the peninsula by Christians and thus becoming the southern part of Castile. The extension of New Castile was formally defined after the 1833 territorial division of Spain as the sum of the following provinces: Ciudad Real, …New Castile is a historic region of Spain. It roughly corresponds to the medieval Moorish Taifa of Toledo, taken during the Reconquista of the peninsula by Christians and thus becoming the southern part of Castile. The extension of New Castile was formally defined after the 1833 territorial division of Spain as the sum of the following provinces: Ciudad Real, Cuenca, Guadalajara, Madrid and Toledo.