Her biography was written, and subsequently her cult popularized, by Hildegard of Bingen, who lived in the same region, about four hundred years later.

She built a small church and led a secluded life with much vigilance and fasting, gave the needy some of her wealth and gradually gathered other people to follow her example.

Rupert died at age 20, but Bertha outlived him by 25 years[3] spent in prayer, fasting, and good works.

After his return, he used his inherited wealth to found churches, living with his mother on a hill at the river Nahe, near Bingen that came to be called the "Rupertsberg".

[2] Hildegard moved, with her nuns, from Disibodenberg to the Rupertsberg, a crag at the confluence of the Nahe and the Rhine, and established a monastery on the site of the ruined castle, where Bertha and Rupert were buried.

The Vita Sancti Ruperti[5] was written about this time, "[…] to revive the cult of St. Rupert and to legitimize the vision that called her to move there".