In Grimm's "Old Rinkrank," a king offers his daughter's hand in marriage to anyone who can cross a glass mountain unscathed. When her betrothed fails, the princess is swallowed by the mountain and imprisoned in a cave by the ogre Rinkrank. Forced into servitude, she endures until devising a plan to escape by trapping Rinkrank's beard in a window. Free at last, she reunites with her family, exposes Rinkrank's treachery, and lives happily ever after with her true love.
