21stcentury catholicchurch christentum christianityandotherreligions congresses criticismandinterpretationramadan doctrinescatholicchurch interfaithmarriage interfaithmarriage(canonlaw) interfaithmarriage(islamiclaw) interreligieuzedialoog interreligiösebeziehung islam islamischetheologie katholischetheologie ramadan relations rooms-katholiekekerk tariq theologicalanthropology trinitätslehre