The legend of Sabina stems from a misreading and mistranslation of an inscription on the portal, which identifies one 'Sabina' as the donor who made it possible for the sculptures to be cut from 'petra dura' or hard (read 'expensive') stone. 'Steinbach' is not a literal translation of 'petra dura' and probably stems from some desire to elaborate the romantic legend that has grown up around the name of the (documented) Erwin. In fact, the style of the pseudo-Sabian figures, Ecclesia and Synagogue, indicates a manufacture of ca. 1225, some fifty years before the recorded activity of Erwin and long before his death, which, in the legend provides the occasion for Sabina's intervention.