Saxe-Coburg-Saalfeld
Saxe-Coburg-Saalfeld was reformed on 29 July 1735, although Coburg and Saalfeld had had the same ruler since 1699. As only men could be the rulers of the duchies, Saxe-Coburg-Saalfeld ceased to exist in 1825, when the last male descendant of the dukes of Saxe-Gotha-Altenburg died. The various dukes reorganised their territories. Saalfeld went the dukes of Saxe-Meiningen, Altenburg went to the Duke of Saxe-Hildburgausen, who gave Hildburghausen to the Duke of Saxe-Meiningen. Gotha and Coburg were combined into the new duchy of Saxe-Coburg and Gotha.