This is a text-based shiur by Rabbi YY Jacobson on the "Kuntres B’einyan Mikdash M’eat Zeh Beis Rabeinu SheB'bavel" (Gemara Megila 29a), by the Lubavitcher Rebbe, exploring the Sugya in Gemarah Megilah about the extrardinary holiness of a Shul, a "miniature" Beis Hamikdash, and how each Shul will become part of the future Beis Hamikdash. The Kuntres goes on to explore the special holiness of the Shul of his father-in-law, the Rebbe Rayatz, "770," a the center dedicated to the spiritual and physical well-being of every Jew the world over, and to spread Torah and Yidishkeit to the entire world. This class was presented to thousands on Wednesday evening, Rosh Chodesh Kislev, 5780, November 27, 2019, at 770 Eastern Parkway, Brooklyn, NY.