Two years ago Pope Francis swapped one of his white skullcaps (calotte) with a TV journalist who has now donated it to an online auction to raise money for the Israeli charity, Save a Child’s Heart. SACH doctors perform life-saving cardiac surgery on children from developing countries.

http://unitedwithisrael.org/pope-francis-skullcap-auctioned-to-raise-funds-for-israeli-life-saving-organization/