. . . . "Ernst I. von Sachsen-Gotha-Altenburg (German)"@en . . . . . . "1675Z"^^ . . . . . . . . "1672Z"^^ . . "1601Z"^^ . . . "Duke of Saxe-Gotha (1640-1675) and Saxe-Altenburg (1672-1675)" . . . "Ernest I, called \"Ernest the Pious\" (Altenburg, 25 December 1601 \u2013 Schloss Friedenstein, Gotha, 26 March 1675), was a duke of Saxe-Gotha and Saxe-Altenburg. The duchies were later merged into Saxe-Gotha-Altenburg.He was the ninth but sixth surviving son of John II, Duke of Saxe-Weimar, and Dorothea Maria of Anhalt. His mother was a granddaughter of Christoph, Duke of W\u00FCrttemberg, and great-granddaughter of Ulrich, Duke of W\u00FCrttemberg."@en . "1675Z"^^ . "1675-03-26Z"^^ . "1601-12-25Z"^^ . "Ernest I of Saxe-Gotha, Duke"@en . . . . . "Ernest I"@en . .