10. Destruction of the Knights Templar
This was a military order dedicated to the cause of the Crusades. Individual Templars were to be poor and pious, but the order as a whole soon became wealthy and powerful.
The Templars created modern banking with a system where pilgrims could deposit money in Europe and withdraw the deposit in the Middle East, making the journey a bit safer from robbers.
However, King Philip IV of France wanted their funds for himself and so, in turn, convinced Pope Clement V that the Templars had become heretical and corrupt.
Across Europe, Templars were arrested and their goods seized; they were then executed. Many were burned at stake.