Complex sentence: His paternal uncle became a protector, and De la Vega lived in Spain for the rest of his life, where he wrote his histories of the Inca culture and Spanish conquest, as well as an account of de Soto's expedition in Florida.
Split into simpler sentences: His paternal uncle became a protector, and De la Vega lived in Spain for the rest of his life. This was where he wrote his histories of the Inca culture and Spanish conquest, as well as an account of Hernando de Soto's expedition in Florida.