World War II
In September 1943, Niccacci was the Father Guardian of the Franciscan Monastery of San Damiano in Assisi. At the direction of Bishop Giuseppe Placido Nicolini and Aldo Brunacci, secretary to the bishop and chairman of the Committee to Aid Refugees, Fr. Niccacci provided Jews with false identities and gave them sanctuary in monasteries and convents.
After the war, Niccacci established a small settlement for destitute Christian and Jewish families in Montenero, outside of Assisi, and served as a parish priest in his home town of Deruta, Umbria.
The picturesque town of Assisi, Italy, sheltered and protected 300 Jews. Father Rufino Niccacci organized the effort, hiding people in his monastery and in the homes of parishioners. A slip of the tongue by a single informant could have condemned the entire village to the camps, yet they did not yield.
Niccacci's home town of Deruta has named a street Via Padre Rufino Niccacci in his honor.
Niccacci was a subject and the narrator of The Assisi Underground, a book written in 1978 by Alexander Ramati about Assisi's efforts to save Jewish refugees. In 1985, the book was made into a movie of the same title. More recently, the story of the Assisi underground is the subject of an Italian novel, La società delle mandorle: Come Assisi salvò i suoi ebrei (2007) by Mirti Paolo.
- Yours Is a Precious Witness: Memoirs of Jews and Catholics in Wartime Italy by Margherita Marchione, Published 1997, Paulist Press, ISBN 0-8091-0485-7, at pp. 85-86.
- * Rufino Niccacci – his activity to save Jews' lives during the Holocaust, at Yad Vashem website
- "Blackbaud Internet Solutions - Online Events and Marketing Solutions". Motlc.learningcenter.wiesenthal.org. 2013-04-02. Retrieved 2018-01-11.
- Yala Korwin, "What really happened in Assisi in 1943-1944?," Midstream, April, 2002 at http://goliath.ecnext.com/free-scripts/document_view_v3.pl?item_id=0199-1835451&format_id=XML
- "Ronald Reagan: Remarks to the American Gathering of Jewish Holocaust Survivors". www.presidency.ucsb.edu. Retrieved 11 January 2018.
- Google Maps for Via Padre Rufino Niccacci, 06053 Deruta PG, Italy
- Alexander Ramati, The Assisi Underground--The Priests Who Saved Jews. New York: Stein and Day, 1978.
- Samuel Oliner, Do Unto Others: Extraordinary Acts of Ordinary People, 2003, Westview Press, ISBN 0-8133-3984-7, at pp. 238–39.
- Susan Zuccotti, The Italians and the Holocaust: Persecution, Rescue, and Survival, 1996, University of Nebraska Press, ISBN 0-8032-9911-7, at pp. 214–15.