The "ideal reader" is a reader for whom the author of a work is writing. Therefore he is essential for the constitution of a text. In the case of Josephus the proem of the Antiquitates shows clearly who this ideal reader is: A member of the Greek/Greek-speaking world, interested in religion and culture of Israel (and other religions and cultures). Sometimes Josephus is also speaking of a Jewish readership, but this has not a decisive role for the constitution of the book, nor does it give the same importance to this Jewish readership. We should therefore not argue for a double readership, for which Josephus develops two different messages.