Motifs for his works (reliefs, statues, and busts) were drawn mostly from Greek mythology, as well as works of classic art and literature. He created portraits of important personalities, as in his statue of Pope Pius VII. Thorvaldsen's statue of Pope Pius VII is found in the Clementine Chapel in the Vatican, for which he was the only non-Italian artist to ever have been commissioned to produce a piece. Because he was a Protestant and not a Catholic, the church did not allow him to sign his work. This led to the story of Thorvaldsen sculpting his own face on to the shoulders of the Pope, however any comparison between Thorvaldsen's portrait and the sculpture will show that this is just a fanciful story built on some smaller similarities.