Castles in Stadtlengsfeld, Medieval castle in Stadtlengsfeld, Germany.

Burg Lengsfeld stands on the western edge of Stadtlengsfeld's old town, positioned 270 meters above sea level with remaining walls and a main building featuring a round tower.

Hersfeld Monastery had Burg Lengsfeld built around 1125 to protect its Felda valley holdings, with the Lords of Lengsfeld serving as ministerials of the Frankenstein dynasts. Around 1300 Fulda Monastery expanded into the valley: in 1235 it gave the castle to the Teutonic Order of Seelheim, and in the 14th century the abbots turned it into a Ganerbenburg shared among several knightly families.

Lengsfeld was granted market rights in 1359, and the Fulda abbots settled knights in the town who built fortified residences of their own. The castle itself became a Ganerbenburg, a joint-inheritance stronghold divided among several families; documented co-owners include Apel von Reckrodt and Paul von Herbilstadt from 1339.

The castle remains are accessible to the public throughout the day, with parking available in town and barrier-free access for wheelchair users, though the building currently operates as a private sanatorium.

During the Peasants' War of 1525, the castle was occupied by rebels, and today the facility functions as a clinic for psychotherapeutic rehabilitation while maintaining its historical architectural elements.