Ignacy Moscicki (Polish pronunciation: [ig'nats? m??'t?itsk?i]; 1 December 1867 – 2 October 1946) was a Polish chemist, politician, and President of Poland from 1926 to 1939.
He was the longest serving President in Poland's history.
He was serving as the president of Poland when Nazi Germany invaded the country on 1 September 1939, starting the Second World War.