Old Castile (Spanish: Castilla la Vieja [kasˈtiʎa la ˈβjexa]) is a historic region of Spain, which included territory that later corresponded to the provinces of Santander (now Cantabria), Burgos, Logroño (now La Rioja), Soria, Segovia, Ávila, Valladolid, Palencia.Its origins are in the historic Castile that was formed in the 9th century in the zone now comprised by Cantabria, Álava, and Burgos.In the 18th century, Charles III of Spain assigned to the kingdom of Castilla la Vieja the provinces of Burgos, Soria, Segovia, Ávila, Valladolid, and Palencia.The royal decree of 30 November 1833, the reform of Javier de Burgos (see 1833 territorial division of Spain), established the basis for the division of Spain into provinces that, with a few modifications, continues down to the present day.Another royal decree, on 30 November 1855, divided Spain into 49 provinces, and assigned the provinces of Valladolid and Palencia to the Kingdom of León, leaving to Castilla la Vieja only Santander, Burgos, Logroño, Soria, Segovia, and Ávila.