A link to Thuringian Lindenau, also only six kilometres from Dietersdorf, where the narrow gauge railway from Hildburghausen ended, also failed to materialise.
It is named after the small town Heldburg situated in the Bad Colberg-Heldburg municipality.
In the beginning, the Principality had the District and city of Hildburghausen, the District and city of Heldburg, the District and city of Eisfeld, the District of Veilsdorf and the half of the District of Schalkau.
The Deutsches Burgenmuseum (German Castle Museum) is a in preparation historical museum at the fortress Veste Heldburg (Castle Heldburg) in the Heldburger Land and in district Hildburghausen in Thuringia.
When his father died in 1675, Ernest and his six brothers jointly assumed the government of the duchy; five years later, in 1680, and under the treaty of division of the family lands, he received the towns of Hildburghausen, Eisfeld, Heldburg, Königsberg.
Heldburger Land means the historic Saxon administrative district Amtsbezirk Heldburg (borough Heldburg) and is today the southernmost part of the Free State of Thuringia and the district of Hildburghausen, between the towns Coburg, Hildburghausen and Bad Königshofen.
1560-1564 expansion of the Veste Heldburg, construction of the French building of the fortress in the Heldburg(gotta fire in 1982, faithful to the original reconstruction since 1990, 2013: restored; furnishings with the Deutsches Burgenmuseum (German Castle Museum), Opening: 2015) and construction of the 114 meter deep castle well
It rises on a former volcanic region to Heldburger Gangschar counted, 405 m high volcanic cone 113 m above the town Heldburg in the Heldburger Land, the southern tip of the district Hildburghausen in Thuringia.