Jan Maria Włodzimierz Ciechanowski was born on 15 May 1887 in ,
Congress Poland,
Russian Empire (now part of
Będzin,
Poland). He was a son of (1845–1927) and Maria Garbińska (1863–1953), and an older brother of Stanisław Ciechanowski (1913–1992). He came from the minor noble family of Ciechanowski, which was of
Jewish descent. His father was a businessperson, and owner of several mines and factories in Grodziec. From 1911 to 1917, Jan Ciechanowski was the administration manager of his father's operations. From 1919 to 1925 he was a
legation counselor at the
embassy of Poland in London, England. In 1928, he and
Frank B. Kellogg,
United States Secretary of State signed treaties of
conciliation and
international arbitration between Poland and the United States. From 1939 to 1940, during the
Second World War he was the secretary-general of the
Ministry of Foreign Affairs of Poland. Ciechanowski died on 16 April 1973 in Washington, D.C., United States. == Works ==