Barnaba Chiaramonti n 1: Italian pope from 1800 to 1823 who was humiliated by Napoleon and taken prisoner in 1809; he concluded a concordat with Napoleon and crowned him emperor of France; he returned to Rome in 1814 (1740-1823) [syn: {Pius VII}, {Barnaba Chiaramonti}, {Luigi Barnaba Gregorio Chiaramonti}]