Louise Hippolyte, Princess of Monaco

On 20 October 1715, at the age of eighteen, she married Jacques François Goyon, Count de Matignon, after his family had proposed him as a candidate. His candidacy was supported by King Louis XIV, who wanted to consolidate French influence in Monaco. Prior to this, Louise Hippolyte's father was eager to wed his daughter to a Grimaldi cousin. This marriage did not materialise due to the poor finances of the Grimaldis at the time.

Her parents came to be in conflict when the marriage of Louise Hippolyte was to be arranged in 1712. Antonio preferred Louise Hippolyte to marry the count de Roye, while Marie preferred the count de Chatillon and, supported by her family, refused to consent to Antonio's candidate.[1] This resulted in a conflict which lasted for two years and caused the anger of Louis XIV.[1] Marie successfully convinced Louise Hippolyte to refuse her father's choice, which resulted in Antonio having Louise Hippolyte imprisoned in a convent. Marie left Monaco and travelled to Paris, where Antonio soon discovered that his plans for Louise Hippolyte were disliked at the French court, and he was forced to release her from prison and give up his plans to marry her to Roye.[1] Marie managed to get Antonio to agree to marry Louise Hippolyte to count de Matignon by suggesting Matignon through the Duchess de Lude. After the marriage of Louise and Matignon, Marie returned to Monaco. When Antonio found out that it was in fact Marie who had suggested Matignon, the relationship between Marie and Antonio further worsened.[1]

The conflict filled marriage of her parents was worsened because of their disagreement around Louise Hippolyte's marriage.[1] Louise Hippolyte and Jacques, who was troubled by this state of affairs, left Monaco after their marriage to reside in France, dividing their time between the royal court of Versailles, Paris and their estate in Normandy. The marriage was not happy; Louise Hippolyte was described as a shy and submissive personality, while Jacques openly flaunted his mistresses in the royal court at Versailles.[1] Louise Hippolyte and Jacques had nine children. After the death of her mother in 1724, Louise Hippolyte inherited a substantial fortune.

After the death of her father on 20 February 1731, Louise Hippolyte traveled without her family from Paris to Monaco and received an enthusiastic reception from the populace upon her arrival on 4 April 1731. As was customary in the case of female monarchs, it had originally been the plan to proclaim Jacques as her joint co-regent. However, it became clear that the people of Monaco did not welcome a Frenchman as co-ruler of Monaco and would prefer Louise Hippolyte as their sole ruler.[1] Louise Hippolyte took advantage of this and took the oath as ruler of Monaco herself before Jacques had arrived, proclaiming herself as the sole ruler, and declared that no order or law issued would be legal without her signature.[1] It is believed that she did this to protect the rights of herself and her son against her husband's ambitions.[1] When Jacques joined her a little while later, the reception was much colder.[1] Finding himself without power, he soon returned to France. Princess Louise-Hippolyte ruled Monaco for seven months. She is described as a popular ruler during her short reign.[1]

At the end of 1731, Louise Hippolyte died of smallpox. Following her death, her husband took power in Monaco, her son being a minor. Jacques neglected the affairs of Monaco and had to leave the country in May 1732. His ambition was to be declared regent until his son reached the age of 25, after which his son should abdicate his throne to him, but this was not accepted in Monaco. He abdicated in favor of their son, Honoré, the next year.