The Rebbe lived in 770 after The Rebbitzen passed away. His bed was moved in to his office and he stayed there. Agav, the shul is not really at the address 770 is had/has a different address but is attached. 770 is the building on the right which contains the small zal (beis medrash) The Rebbe’s office, and The Frierdiker Rebbe’s living quarters etc. These are attached by stairs to the basement shul which most people will recognize from videos of the farbrengens (excepting the ones in the early years which took place in the small zal, and a few times at different venues). Above the basement shul are the offices of Merkaz L’Inyonie Chinuch etc.
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