Warren Klein, Sharon Liberman Mintz and Joshua Teplitzky have edited a collection of 18 fascinating essays that outline and explain the appeal of the etrog: Be Fruitful! The Etrog in Jewish Art, Culture, and History.For PaleoJudaica posts on the etrog (citron) and its relation to Sukkot and its appearance on ancient coins and mosaics, see here, here, here, here, here, here, and links.
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