Seeburg Castle (Ruin) (Hartershausen)

Seeburg Castle, also known as Seeburg, Hartershausen Castle, or Old Wall, is a castle ruin near the Hartershausen district of the town of Schlitz in the Vogelsbergkreis. The ruin of the hilltop castle is located on an elevation in the Hartershausen area, about 1100 meters west of the village, in front of the Seeberg (with burial mounds).

Two hundred meters to the north, a stream coming from the Welsgrund flows around the castle site. On the "Burgberg" itself, another spring originates on the eastern slope, about 250 meters from the castle site, halfway to the village, which was certainly important for the castle's drinking water supply. All the mentioned streams and springs flow into the Fulda.

Seeburg Castle was presumably built in the 12th century to protect the possessions of Fulda Abbey. From a ministerial family of the Imperial Abbey of Fulda emerged the influential family of the Lords of Schlitz, who were first mentioned in a document in 1116 with Ermenoldus de Slitese and who could be considered the builders of the castle. In addition to the settlement of Hartershausen, the villages of Hemmen and Üllershausen, located in this valley, probably also belonged to the castle district.

The destruction of Seeburg in the 13th century is attributed to Bertho II von Leibolz.

Of the former castle complex, the eastern half of the keep is still preserved in its rising structure. Ramps and moats have been leveled. The ruin is a protected monument and rises visibly above the village as a landmark.