King Charles III of Spain was the fourth great-grandfather of King Juan Carlos I. King Charles III was born in 1716 and reigned from 1759 to 1788. He was the son of King Philip V of Spain and Elisabeth Farnese. King Charles III was a successful ruler and is credited with improving the economy and military of Spain. He also promoted the arts and sciences.
The Extraordinary Legacy of William Cavendish-Bentinck, 3rd Duke of Portland: A Captivating English Quiz!