Franz Frederick Anton, Duke of Saxe-Coburg-Saalfeld (b. Coburg, July 15 1750 - d. Coburg, December 9 1806), was a duke of Saxe-Coburg-Saalfeld. He is a direct ancestor of Queen Elizabeth II of the United Kingdom, Leopold II of Belgium, Carlota of Mexico, and King Albert II of Belgium.
He was the eldest son of Ernst Frederick, Duke of Saxe-Coburg-Saalfeld and Sophia Antonia of Brunswick-Wolfenbüttel.
Franz Frederick succeeded his father in the duchy of Saxe-Coburg-Saalfeld when he died in 1800.
He received a private, careful and comprehensive education. From this training, he became in a large art connoisseur. Franz Frederick is considered as the greatest collector of books and illustrations among the dukes of Saxe-Coburg-Saalfeld (later Gotha). He laid the basis for a 300,000 picture collection of copperplate engravings in 1775, which can be visited today on the Veste Coburg and equipped the library of his residence with an extensive book collection. He bought in 1805 - only a few months before his death - the Schloss Rosenau as summer residence for his family.
| Name | Date of Birth | Date of Death | Age of Death | Notes |
|---|---|---|---|---|
| Sophie Fredericka Caroline Luise | August 19 1778, in Coburg | July 8 1835, in Tušimice, Bohemia | 56 years | Married on February 23 1804 to Emmanuel von Mensdorff-Pouilly (later Count von Mensdorff-Pouilly). |
| Antoinette Ernestine Amalie | August 28 1779, in Coburg | March 14 1824, in St. Petersburg | 44 years | Married on November 17 1798 to Alexander of Württemberg. |
| Juliane Henriette Ulrike [upon her marriage, she took the name Anna Feodorovna in a Russian Orthodox baptism] | September 23 1781, in Coburg | August 15 1860, in Elfenau, near Berne, Switzerland | 78 years | Married on February 26 1796 to Grand Duke Constantine Pavlovich of Russia, the younger brother of Czar Alexander I of Russia (they divorced in 1820). |
| Stillborn Son | 1782 | 1782 | - | |
| Ernst I Anton Karl Ludwig, Duke of Saxe-Coburg-Gotha | January 2 1784, in Coburg | January 29 1844, in Gotha | 60 years | The father of Albert, the husband of Queen Victoria. |
| Ferdinand Georg August | March 28 1785, in Coburg | August 27 1851, in Vienna | 66 years | The father of Ferdinand II of Portugal and Victoria of Saxe-Coburg-Kohary. |
| Marie Luise Viktoria | August 17 1786, in Coburg | March 16 1861, in Frogmore House | 74 years | Married on July 11 1818 to Prince Edward Augustus, Duke of Kent and Strathearn, the fourth son of King George III of Great Britain, the mother of Queen Victoria. |
| Marianne Charlotte | August 7 1788, in Coburg | August 23 1794, in Coburg | 6 years | |
| Leopold Georg Christian Frederick | December 16 1790, in Coburg | December 10 1865, in Laeken | 75 years | First king of the Belgians under the name of Leopold I. His children included Leopold II of Belgium and Empress Carlota of Mexico. |
| Franz Maximilian Ludwig | December 12, 1792, in Coburg | January 3 1793, in Coburg | 22 days | |
His descendants established ruling houses in Belgium, United Kingdom, Portugal and Bulgaria. His son Leopold ruled as Leopold I of the Belgians. His male-line great-grandson reigned as Edward VII of the United Kingdom. Another grandson, Ferdinand, reigned as jure uxoris king Ferdinand II of Portugal. His granddaughter, Leopold I of Belgium's daughter, was Empress Carlota of Mexico. Furthermore, a great-grandson ruled as Ferdinand I of Bulgaria.