B'Mechitzato - HaAdmor HaKadosh mi'Ribnitz

Rabbi Chaim Zanvl Abramowitz (1893-1995), , was known as the Ribnitzer Rebbe.

He managed to live a fully Jewish religious life even under Stalin's rule. He served as mohel and shochet.
He often fasted and immersed himself many times daily in water that was sometimes only accessible by chopping away very thick ice.
His Tikkun Chatzos in sackcloth and ashes regularly lasted 6–7 hours, sometimes stretching as long as 12. He cried so much during Tikkun Chatzos that when he was done, the tears and ashes mingled so that he was sitting in mud.

He left the Soviet Union in 1970 and moved to the Mattersdorf section of Jerusalem, where he lived for a few years before moving to the United States. He lived in Miami, Los Angeles, and Sea Gate, Brooklyn, before he finally settled in Monsey, New York, where he died on Isru Chag (Succos).
He is buried in the Vizhnitzer Cemetery.