In 1792 the Duke of Saxe-Weimar was also the Duke of Saxe-Eisenach , and the Duke of Saxe-Altenburg was also the Duke of Saxe-Gotha , so both had two votes ; and the Duke of Saxe-Coburg had one vote . In the 1792 Session of the Reichstag , the Duke of Saxe-Weimar was also the Duke of Saxe-Eisenach , and had two votes ( as well as three-eights of all the Ernestine lands ) ; the Duke of Saxe-Altenburg was also the Duke of Saxe-Gotha ( as senior heir of both Duke John Philip and Duke Ernest the Pious ) , and had two votes ; and the Duke of Saxe-Coburg had one vote .