The chapel's roughly 1,500-year building history has led to its beginnings being uncovered only bit by bit: Long were those sought – not least of all because of Bishop Sidonius's patronage – in Frankish times. According to more recent investigations, one may presume that there was “in it a late-Antiquity country church” of the Bishop of Mainz, that not least of all because of that can be acknowledged “as an especially vital centre of Roman-Christian tradition”. “The chapel can be said to be…Rhenish Hesse’s oldest established religious structure”.