The Mass booklet, or liturgical aid, is inscribed, in Latin, The Second Sunday after Easter, with the date, 27 April, 2014.
Any time there is a special occasion at the Vatican, a booklet is produced to commemorate the occasion that acts as a liturgical aid for participants. They are glossy pages and in various languages. Everyone gets a copy of these booklets.
Father Kunst has dozens of these. He has one from the beatification of Mother Teresa, the canonization of Jose Maria Escreva, the 25th anniversary of the pontificate of Pope John Paul II, the election of Pope Benedict XVI, the Conclaves, and the funeral of Pope John Paul II. He has collected and been given many of them, but the most significant are the ones mentioned, particularly the Mass booklet from the funeral of Pope John Paul II.
This one, of course, from the canonizations of Saint John Paul II and Saint John XXIII has become the most significant. Father Kunst not only was present at the canonizations, but had the opportunity to distribute communion at the canonization Mass.