Sibylla of Jerusalem was the third of five reigning Queens of Jerusalem - but she was also the one who lost the city of Jerusalem. She was not born or raised to rule, and she struggled to maintain control of her Kingdom.
Sources/Further Reading
Pangonis, Katherine: Queens of Jerusalem- The Women Who Dared To Rule
Montefiore, Simon Sebastian: Jerusalem - The Biography
Jones, Dan: Crusaders- An Epic War for the History of the Holy Lands
Wikipedia
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