Jerzy Popiełuszko (born Alfons Popiełuszko, 1947–1984) was a Polish Roman Catholic priest associated with the Solidarity trade union in communist Poland. He was known for sermons that combined spiritual messages with criticism of the government and support for the interned. In 1984 he was murdered by three Security Service agents, who were later tried and convicted. The Catholic Church recognized him as a martyr, and he was beatified in 2010.