Determining the richest king in history is challenging as it is difficult to compare the wealth of kings across different time periods and regions due to differences in currency, economic conditions, and the availability of resources. However, based on available historical records and estimates, some of the wealthiest kings in history include:
- Mansa Musa I of Mali - estimated net worth: $400 billion (14th century)
- Emperor Akbar of the Mughal Empire - estimated net worth: $21 trillion (16th century)
- Augustus Caesar of the Roman Empire - estimated net worth: $4.6 trillion (1st century AD)
- King Solomon of Israel - estimated net worth: $2.2 trillion (10th century BC)
- Emperor Shenzong of Song Dynasty China - estimated net worth: $30 billion (11th century)
It's worth noting that these are only estimates based on historical records and do not take into account the many complexities and nuances of historical wealth and economics. Additionally, there may have been kings and rulers throughout history whose wealth was not accurately recorded or estimated, and thus may have been even richer than those on this list.