Complex sentence: New Castile (Spanish: Castilla la Nueva) was the southern part of the Kingdom of Castile in central Spain, taken during the "reconquista" of the peninsula by Christian kings from Muslim rulers.
Split into simpler sentences: New Castile (Spanish: Castilla la Nueva) is a historic region of Spain. It roughly corresponds to the southern part of the Kingdom of Castile, taken during the "Reconquista" of the peninsula by Christian kings from Muslim rulers.