7) William the Conqueror – Net worth: $209 billion (England)
William the Conqueror was once the ruler of England. At that time England was called norman state. He made his fortune by grabbing the lands of people, businesses, goods services, estate golds. He was the cruelest ruler of his time. He made his 209 billion dollars fortune by all illegal sources. He has secured the 7th position in the list of Top 10 richest persons of last 1000 Years.
Also see: richest black man in history
8) Muammar Gaddafi – Net worth: $200 billion (Libya)
Muammar Gaddafi also holds the records of the longest ruling. He was the ruler of Libya. Withs the fortune of $ 200 billion he has secured the 8th position in the list of Top 10 richest persons of last 1000 Years. He was the most controversial ruler of 20th-21st century. His elder son has gifted the 20 million pounds palace to his girlfriend. Which he purchased just in few seconds. Later he was killed by the revolutionaries, they dragged him in the streets of Libya.
Also See: Richest man in the world ever