Guardian stones
Guardian stones (German: Wächtersteine) are standing stones, always occurring in pairs, at the corners of rectangular and trapezoidally-arranged stone enclosures (hunebeds) around a dolmen. They are found especially in Scandinavia, in the German states of Mecklenburg-Vorpommern, Lower Saxony (Salongrab), Saxony-Anhalt (Drebenstedt, Leetze, Winterfeld) and occasionally in Holstein (Alter Hau).