sentences:  At Christiansborg Palace on 1 September 1764 she married her cousin Prince William of Hesse, Count of Hanau, one of the wealthiest rulers of the period.Wilhelmina Caroline and William had grown up together, as William and his siblings had been evacuated to the Danish royal court during the Seven Years' War (1755–1763), as his and Wilhelmina Caroline's mother were sisters.He was introduced to her as a playmate during her childhood, and it was decided already during their childhood that they should marry each other when they became adults.