Logo of the Polish Aviation Museum in Kraków

Chrystian Kretowicz (1896–1975) – major observer of the Polish Army. He was born on 13 August 1896 in Lwów and died on 3 June 1975 in San Diego. During World War I he served in the Polish Legions in the ranks of the 1st Brigade of the Polish Legions, and subsequently took part in the Polish-Bolshevik War. After Poland regained independence he served in the Polish Army, including the 39th Infantry Regiment (1922). In 1923, 1924 and 1934 he was an officer of the 2nd Aviation Regiment in Kraków, associated with aviation as an observer. During World War II he served in the Polish Army in the East. After the war he remained in exile in the United States, where he died in San Diego.