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Techelet was a blue dye made from a creature called Chilazon that the Torah commands us to use in making Tzitzit strings worn on four cornered garments such as a Tallit. It was also used in the temple for the priestly garments.

More than 1,500 years ago we lost the techelet and therefore no longer dye out tzitzit blue. Can the Techelet and the Chilazon it comes from be found today using Torah sources, archaeology and knowledge of biology and ancient dying techniques?

A fascinating journey of how different scholars and researches attempted to find the mystery Techelet over the past century.