Jan Franciszek Czartoryski
Polish noble and Dominican (1897-1944)
Feast: 6 September (not on the universal Roman calendar; kept in the Roman Martyrology or local calendars)
Who they were
At Warsaw in Poland, Blessed Michael Czartoryski, priest of the Order of Preachers and martyr, who, during the invasion of Poland by enemies of God, died by firing squad near the local parish for refusing to deny the faith.
The miracles
As a martyr he was raised to the altars without a miracle.
Why that counted as sanctity
The Roman Martyrology remembers him on 6 September as a Dominican priest shot at Warsaw for refusing to deny the faith.
The cause
Jan Franciszek Czartoryski has been beatified; the cause continues. Favours received, and offers of help, go to the postulation, the office that carries the cause forward: Dominicans: the cause of Blessed Michal Czartoryski.
- Roman Martyrology, 6 September (Italian Bishops' Conference, Santo del giorno)
- Wikidata Q586593 — dates, feast day and identifiers (CC0)
- English Wikipedia — Jan Franciszek Czartoryski (CC BY-SA)
Checked against the sources listed on 22 September 2026. Corrections welcome.