Heldburg was first mentioned in 837. It lies at the foot of the Heldburg Fortress. In 1374 it passed to the landgraves of Thuringia.[3] Heldburg was granted town rights in 1394.
^ abMeyers Großes Konversations-Lexikon. Vol. 9. Leipzig und Wien. 1906. p. 132.{{cite book}}: CS1 maint: location missing publisher (link)
^Buchenwald. Ausgrenzung und Gewalt 1937 bis 1945 (in German). Bad Berka. 2016. p. 214. ISBN978-3-9816900-3-3.{{cite book}}: CS1 maint: location missing publisher (link)