On 3 June 1963, two days after the Feast of Pentecost, Pope John XXIII died of cancer.
SOURCE
Stefan Gigacz, The Leaven in the Council, Chapter 7, The Council opens without Cardijn (Australian Cardijn Institute)
PHOTO
De Agostini Editore – StJohnXXIIICommunity.com: Info Pic Flipboard.com: Info Pic / Wikipedia