The Vatican Web site lists all of Benedict’s activities, meetings and writings.

Greg Tobin is senior adviser for communications at Seton Hall University in New Jersey and author of Holy Father: Pope Benedict XVI: Pontiff for a New Era.

Sang Hyun Lee, an ordained Presbyterian minister, is Kyung-Chik Han Professor of Systematic Theology at Princeton Theological Seminary and directs the program for Asian-American theology and ministry.

The Rev. Thomas G. Guarino is a professor of systematic theology at Seton Hall University in New Jersey. He has written on the theological vision of Joseph Ratzinger.

The National Catholic Reporter has a June 22, 2009, podcast and summary of a story, “Jesuit sees convergence of U.S., Vatican policies,” featuring an interview with the Rev. Thomas Reese about relations between the Vatican and the Obama administration.

Read a June 22, 2009, National Catholic Reporter story, “Progressive Catholics at home in Obama administration.”

Read a June 22, 2009, analysis of the encyclical’s themes, “Economic encyclical expands on church’s ‘best kept secret’,” by National Catholic Reporter columnist John L. Allen Jr.

Read a June 24, 2009, blog post at the Web site of the Jesuit magazine America, “Obama going to the Vatican,” by Michael Sean Winters.

Read a Nov. 1, 2007, CNN story about two Christian pastors embracing elements of Scientology for their congregations.