WordNet (r) 3.0 (2006):

Pius VII
    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]