Jan Franciszek Czartoryski was a Polish nobleman and a member of the Dominican Order who lived from 1897 to 1944. After studying architecture at the Lviv Polytechnic, he entered the Dominican Order in Lviv and was ordained as a priest in 1931. During the Second World War, he served as a chaplain for the Armia Krajowa Group Konrad. He was killed by German forces in Warsaw during the uprising, making him one of the 108 Polish martyrs of the war.