The calendar stone of a prehistoric ritual site is Leodagger with Näpfchenstein and visor slit to observe the sun stands. It is in a field in the village Weinviertler Leodagger (Pulkau municipality) in Lower Austria.
The cult site consists of a rock formation with a slip stone, a menhir and a Näpfchenstein. This excellent flat terrain from rock was a Bronze Age place of worship, such as archaeological excavations have proved. A smooth rock wall and a menhir form a 50 cm wide visor aperture through which the spring and autumn equinox can be observed. Up on the plateau is an exceptional stone block with 16 cups or bowls, which have been in prehistoric times as a marker and may also serve to observe the Sun. The entire rock formation called "Calendar Stone" in the 14th Century it was called the "stone in the Aul" (Celtic = Aul of avos, German river). Probably it is an ancient source and sun worship.