In the legend of the Schierstein Iron Man, it is said that a flickering blue light rises from the dark waves of the Rhine as soon as the Schierstein church clock strikes midnight. Every night it takes the same route from the banks of the Rhine through the meadows into the vineyards, up to Frauenstein Castle and to the crypt where the members of the extinct knightly family are buried. The last of them is not laid to rest there. As soon as the eerie light approaches the leaden coffin, he has to get up and follow the glow. Night after night, his ghost walks the path to Schierstein and further down the Rhine in rattling iron armor as atonement for having seduced and abandoned a Schierstein fisherwoman. The girl threw herself into the Rhine in despair when she realized that her love had not been without consequences - on the same night, the light is said to have risen from the black waters for the first time to search for her unfaithful lover ... Over the course of many hundreds of years, the once handsome knight has shrunk into a hatted little man, the gruesome apparition is called the Iron Man.

The legend of the Iron Man is one of the best-known Wiesbaden legends. It presumably revolves around the last male descendant of the Frauenstein knights, who died childless before 1427 with Ulrich. The Eisenmännchen district and the Eisenmännchenstraße in Schierstein still exist today.