The term "interreligiosity" is a characteristic invention of the postmodern discourse of religious studies. But the feature it denotes-the mutual connections between religions, whereby they can share new viewpoints and paradigms-is not modern at all. One can say that religiosity and interreligiosity are correlative conceptions: when speaking of religion as a social entity, one is immediately and everywhere confronted by interreligious aspects. The present volume contains various essays exploring such interreligious aspects found within the history and traditions of Judaism and Christianity.