(Translated with Google Translate)
In 1899, the archaeologist Robert Forrer undertook to excavate the site of the troglodyte habitat of Graufthal. From these works we can conclude that after being used as warehouses in the Middle Ages, the rocky overhangs were converted into dwellings, probably around 1760, as indicated by a vintage, which has now disappeared, engraved on the lintel of a door. People of modest means settled using the rock cavities to reduce the surface area of roofs and facades. These houses were occupied until 1958. . . . The troglodyte houses have two sets housed in two horizontal faults. The residential houses, embedded in the first fault, are located approximately 7 meters above the village. The Match Factory is located in the Upper Rift. These buildings are built directly on the rock, in rubble masonry, partially covered with flat tiled roofs, where the rocks do not completely overhang them. The frames are basic, the interior partitioning rudimentary. Access to the complex is via a passageway bordering a rock projection. A ramp provides fall protection.
Ministere de la Culture
The houses are set into caves in red sandstone cliffs. There are two sets of buildings in two horizontal caves, reached by a footpath. The houses are in the first cave, about 7 metres (23 ft) above the village street. A match factory is located in the upper cave. These buildings are built into the rock, with rubble masonry, and are partially covered with tile roofs where they are not fully protected by the rock ceiling. They are roughly built, with rudimentary internal partitioning. The houses have the same internal layout. On the ground floor there is a kitchen beside the room where the parents would have lived, and a stable with unplastered walls. Above that is a second floor holding a dormitory for the children and a hayloft and granary.
Part of photo “Felsenwohnungen in Graufthal”, after 1870. from Wikimedia Common