Raiders' high priest costume (Paul Freeman) - reference material

When flipping through an old Dutch illlustrated '70ies dictionary, I came across this image depicting a 'high priest' - note the specific chest ornamental piece and hat - the likeness with the priest robes Freeman wore in Raiders are seemingly identical !

Has anyone got more info on the origins of this image ?
I suppose it's based on actual religious artefacts of ancient hebrew priestship (or is it 'pre-rabbi-ship' in this case?), but I haven't done any research on this yet...



Thanks for any info

Well, Spielberg is Jewish and he did strive for accuracy...even if they got some of the details about the Ark of Cov. wrong. (Mt. Horab, broken pieces, etc)