In the 11th century, the dynasty's estates around the ancestral seat
Henneberg Castle near
Meiningen belonged to the German
stem duchy of
Franconia. They were located southwest of the
Rennsteig ridge in the
Thuringian Forest, then forming the border with the possessions held by the
Landgraves of Thuringia in the north. In 1096 one Count Godebold II of Henneberg served as a
burgrave of the
Würzburg bishops, his father Poppo had been killed in battle in 1078. In 1137 he established
Vessra Abbey near
Hildburghausen as the family's house monastery. The counts lost their position as the bishops were raised to "Dukes of Franconia" in the 12th century. Nevertheless, in the course of the
War of the Thuringian Succession upon the death of Landgrave
Henry Raspe, Count
Herman I of Henneberg (1224–1290) in 1247 received the Thuringian lordship of
Schmalkalden from the Wettin margrave
Henry III of Meissen. After the extinction of the Bavarian
House of Andechs upon the death of Duke
Otto II of Merania in 1248, the Counts of Henneberg also inherited their Franconian lordship of
Coburg (then called the "new lordship", later
Saxe-Coburg). In 1274 the Henneberg estates were divided into the
Schleusingen, Aschach-
Römhild and Hartenberg branches. Count
Berthold VII of Henneberg-Schleusingen (1272–1340) was elevated to princely status in 1310, his estates comprised the towns of Schmalkalden,
Suhl and Coburg. In 1343 the Counts of Hennberg also purchased the Thuringian town of
Ilmenau. The Coburg lands passed to the Saxon House of Wettin upon the marriage of Countess
Catherine of Henneberg to Margrave
Frederick III of Meissen in 1347. After the
Imperial Reform of 1500, the County of Henneberg formed the northernmost part of the
Franconian Circle, bordering on the
Upper Saxon Ernestine duchies and the lands of the
Upper Rhenish prince-abbacy of
Fulda in the northwest. A thorn in the side remained the enclave of
Meiningen, a fief held by the
Bishops of Würzburg, which was not acquired by the counts until 1542. ==Disestablishment==