The Pontifical Mission Societies launched a campaign called Joke with the Pope, which encourages people to donate their favorite joke to the pope. The winner of the contest, which will run until October 2, will be named honorary comedic advisor to the pope, and one charitable cause will receive a $10,000 donation. 

Contestants choose one of three causes to support: helping street children in Buenos Aires, Argentina; housing the homeless in Addis Ababa, Ethiopia; or feeding the hungry in Nairobi, Kenya. Here's the submission from Bill Murray, honorary advisor for pontifical comedy:

Conan O'Brien also donated a joke in honor of the pope's visit to the United States:


The winner will be announced on October 5. It's probably best not to tell any jokes about a 12-inch pianist. 

Sources: Joke with the Pope