[1] Margrethe was related to Bishop Absalon of Roskilde, and married to Herlog in Ølsemagle in Kjøge.
In 1176, she was murdered by her spouse, who hanged her corpse to make it appear as if she had committed suicide.
As a suicide, she was buried outside of church blessing at the beach of Ølsemagle Strand.
When miracles appeared by her grave, Absalon conducted an investigation, which exposed the murder upon the confession of Herlog.
A chapel to her honor was erected upon the beach of her former grave, and Roskilde Abbey was founded nearby.