A threshold stone or sill stone (German: Schwellenstein) is a rectangularly dressed stone slab that forms part of the entrance of megalithic tombs of the...

infill (Zwischenmauerwerk) Entrance and threshold stone (Zugang und Schwellenstein) Chamber flooring (Kammerdielen) Chamber layout (Kammereinrichtung)...

diameter in the centre of which the remains (the uprights and the joist (Schwellenstein)) of a passage grave are located. Sites 5 and 6 are Bronze Age tumuli...

Another feature of ground-level entrances is a so-called stone sill (Schwellenstein). This separates the secular or profane area of the passage from the...