E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Morasteen [great stone]. The ancient Danes selected their king
from the sacred line of royalty. The man chosen was taken to the
Landsthing, or local court, and placed on the morasteen, while
the magnates ranged themselves around on stones of inferior
size. This was the Danish mode of installation.