I have already noted this discovery here. This article covers some of the same ground, but also interviews another archaeologist who offers a different interpretation of the artifact.
While we're at it, this Ancient Jew Review book note on a new (and in itself important) book by Georgia Frank is of some background interest:
Unfinished Christians: Ritual Objects and Silent Subjects in Late Antiquity (Ethan Laster)
Chapter two is especially relevant.
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