The Federal Prison, Chapultepec, as it appears today.
The Federal Prison in Chapultepec, Capital District, is a building where those charged with crimes against the national government of the United States of Mexico are held during trial. It is best known for housing some 8,000 escaped Negro slaves who were charged with treason after joining the invading French army during the Hundred Day War. The Chapultepec treason trials ended on 4 January 1916, when 2,000 young protesters stormed the Federal Prison and freed the imprisoned slaves.