Halachic archeology is the utilization for halacha and Jewish sources to explain archeological finds that have been misinterpreted. The halachcic archeology actually is the synthesis and proof of validity of ancient Jewish texts. Often this is critical for understanding the specifics of halacha that has not been used, in some cases for centuries. Issues like what is a chatzer, a kezayit, tekhelet, are examples of topics that halachic archeology can shed light.
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Video – The Meaning Of Tekhelet - Rabbi Tzvi Hirsch Weinreb – OU Exec VP emeritus