
Pope Benedict XVI —
Pope Benedict XVI waves in St. Peter's Square in the Vatican in December 2012. Benedict, 85, announced on Monday, February 11, that he will resign at the end of February "because of advanced age." The last pope to resign was Gregory XII in 1415.

Pope Benedict XVI —
Joseph Ratzinger, who became the 265th pope in 2005, poses for a photo while a German air force assistant in 1943.

Pope Benedict XVI —
Cardinal Joseph Ratzinger, right, poses for a picture in Vatican City in June 1977 with fellow cardinals, from left, Cardinal Gappi, Cardinal Tomazek, Cardinal Gantin and Cardinal Benelli. Ratzinger was named cardinal-priest of Santa Maria Consolatrice al Tiburtino by Pope Paul VI in June 1977.

Pope Benedict XVI —
Ratzinger, who was serving as cardinal-priest of Santa Maria Consolatrice al Tiburtino, visits Madrid in 1989.

Pope Benedict XVI —
Ratzinger fills in for Pope John Paul II during the Easter Vigil service in Saint Peter's Basilica in March 2005.

Pope Benedict XVI —
Newly elected as pope, Benedict XVI gestures to the crowd in St. Peter's Square in Vatican City on April 19, 2005.

Pope Benedict XVI —
Benedict meets Prince Albert II of Monaco at the pope's private library in Vatican City in December 2005.

Pope Benedict XVI —
Benedict kisses the altar before addressing the crowds at Jasna Gora Monastery in Czestochowa, Poland, in May 2006.

Pope Benedict XVI —
Benedict waves from under an umbrella as he arrives to lead his weekly general audience in Saint Peter's Square at the Vatican in October 2007.

Pope Benedict XVI —
Benedict speaks at the United Nations General Assembly in New York in April 2008.

Pope Benedict XVI —
Benedict celebrates a Mass at the end of a synod of Catholic bishops in October 2008 at St. Peter's Basilica at the Vatican.

Pope Benedict XVI —
Benedict attends a screening of a movie about his predecessor, Pope John Paul II, on October 16, 2008, in Vatican City during celebrations of the 30th anniversary of John Paul's election as pontiff.