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John Frederick (German: Johann Friedrich; 25 April 1625 in Herzberg am Harz – 18 December 1679 in Augsburg)[1] was duke of Brunswick-Lüneburg. He ruled over the Principality of Calenberg, a subdivision of the duchy, from 1665 until his death.
| John Frederick | |
|---|---|
| Duke of Brunswick-Lüneburg Prince of Calenberg | |
| Born | 25 April 1625 Herzberg am Harz, Göttingen, Principality of Calenberg, Kingdom of Germany |
| Died | 18 December 1679 (aged 54) Mixed Imperial City of Augsburg, Kingdom of Germany |
| Spouse | |
| Issue | |
| House | Hanover |
| Father | George, Duke of Brunswick-Lüneburg |
| Mother | Anne Eleonore of Hesse-Darmstadt |
The third son of George, Duke of Brunswick-Lüneburg, John converted to the Roman Catholic Church, the only member of his family to do so, in 1651, after witnessing Joseph of Cupertino miraculously levitate while in Italy in 1649.[2] He received Calenberg when his elder brother George William inherited the Principality of Lüneburg. In 1666, he had a palace built in Herrenhausen near Hanover that was inspired by the Palace of Versailles and is famous for its gardens, the Herrenhausen Gardens.
In 1667, he employed as his master builder the Venetian architect Girolamo Sartorio, who designed many buildings in the town, including the Neustädter Kirche, and was instrumental in the expansion of the Herrenhausen Gardens.
In 1676, John Frederick employed Gottfried Wilhelm Leibniz as Privy Councillor and librarian of the important ducal library. Thus began Leibniz's 40-year association with the House of Hanover, which resulted in three generations of Hanovers being patrons to one of the most eminent philosophers and mathematicians of Europe.

Children
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John Frederick married Benedicta Henrietta of the Palatinate, daughter of Edward, Count Palatine of Simmern and Anna Gonzaga, on 30 November 1668. They had four daughters:
- Anna Sophie (10 February 1670 – 24 March 1672), died in childhood;
- Charlotte Felicitas (8 March 1671 – 29 September 1710), married Rinaldo d'Este, Duke of Modena
- Henriette Maria (9 March 1672 – 4 September 1687), died unmarried;
- Wilhelmina Amalia (1673 – 10 April 1742), married Joseph I, Holy Roman Emperor
Ancestry
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Notes
edit- ↑ "Hamburg den 29. December". Swenska Ordinarie Post-Tijender (in Swedish). 13 January 1680. p. 3.
- ↑ Eire, Carlos M. N. (2023). They Flew: A History of the Impossible. Danbury, CT: Yale University Press. p. 121. ISBN 978-0-300-25980-3.