Proper noun
New Castile
(historical) A Spanish governorate in South America that existed from 1528 to 1542.
The capture of Toledo in 1085 added New Castile to the crown's territories, and the battle of Las Navas de Tolosa (1212) heralded the Muslim loss of most of southern Spain. Source: Internet
Note how Old Castile was called Kingdom of Castile and New Castile was called the Kingdom of Toledo. Source: Internet
Castile and other Iberian regions in 1770 Old Castile and New Castile (1833 until the early 1980s). Source: Internet
Madrid had been in New Castile until the 1970s and has traditionally been considered Castilian. Source: Internet
The king of Spain had awarded the Governorate of New Toledo to Almagro and the Governorate of New Castile to Pizarro. Source: Internet