In this Two-Part series we explore the history of Techeiles, the long-lost blue thread that the Torah commands us to attach to our Tzitzis. We mainly focus on how our Rabbeim responded to the (now less popular) Radzyner Tekheles, but we also discuss how the principles found in the Rebbe's letters and Sichos may apply to modern Teckhelet.

Part I: The Rebbe Rashab's Letter

Part II: The Rebbe's Letters and Sichos