Background
She was born into the House of Hanover and later married into the House of Este. Born at Schloss Herrenhausen in Hanover, a palace later destroyed in World World War II, she was the eldest surviving daughter of John Frederick, Duke of Brunswick-Lüneburg and his wife, Benedicta Henrietta of the Palatinate. Her father had been the ruler of Brunswick-Lüneburg since 1665 and her parents had been married since 1668.
Career
She was thus the Duchess of Modena by marriage. She died in childbirth. Some sources refer to her simply as Charlotte.
Charlotte had two younger sisters: Princess Henrietta and Princess Wilhelmina Amalia, who made a prestigious marriage in 1699 to the Holy Roman Emperor, Joseph I.
Charlotte married Rinaldo d"Este in Modena on 11 February 1696.
Rinaldo wanted to encourage relations between Modena and Brunswick, whose ruling house was the House of Hanover. The marriage was celebrated splendidly despite financial problems in Modena.
The artist Marcantonio Franceschini was commissioned to paint a room, the Salone d"onore at the ducal palace in honour of the marriage. Charlotte fled Modena for Bologna in 1702 along with the rest of the Modenese royal family in order to avoid French troops in Italy due to the War of the Spanish Succession.
Her husband was sixteen years older than Charlotte, but the two had seven children.
Her second daughter, Enrichetta, went on to marry first in 1727 Antonio Farnese, Duke of Parma and, after his death in 1731, Leopold, Landgrave of Hesse-Darmstadt. Charlotte died at the Ducal Palace of Modena after giving birth to a daughter in September 1710. The child also died. She was buried at the Church of San Vincenzo in Modena.
Her son succeeded as Duke of Modena in 1737.
Benedetta Maria Ernesta d"Este (18 August 1697-1616 September 1777) died unmarried;
Francesco d"Este (2 July 1698-1622 February 1780) future Duke of Modena. Married Charlotte Aglaé d"Orléans and had issue;
Amalia Giuseppina d"Este (28 July 1699-1695 July 1778) married the Marquis de Villeneuf, had no issue;
Gian Federico d"Este (1 September 1700-1724 April 1727)
Enrichetta d"Este (27 May 1702-1730 January 1777) married Antonio Farnese, Duke of Parma had no issue.
Married Leopold, Landgrave of Hesse-Darmstadt, grandson of Louis VI, Landgrave of Hesse-Darmstadt, had no issue;
Clemente d"Este (20 April 1708-1723 April 1708) died in infancy;
X d"Este (September 1710) female, died at birth;
Titles and styles
8 March 1671 – 11 February 1696 Her Serene Highness Duchess Charlotte of Brunswick-Lüneburg
1 February 1696 – 29 September 1710 Her Royal Highness The Duchess of Modena and Reggio.