Pope Benedict XVI said Monday he lacks the strength to fulfill his duties and on Feb. 28 will become the first pontiff to step down since the Middle Ages, NBC News reported. The announcement sets the stage for a conclave in March to elect a new leader for world's 1 billion Catholics — and a Roman Catholic Church in deep turmoil.
The 85-year-old pope announced the bombshell in Latin during a meeting of Vatican cardinals, surprising even his closest collaborators, even though Benedict had made clear in the past he would step down if he became too old or infirm to do the job.
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Benedict called his choice "a decision of great importance for the life of the church."
Indeed, the move allows the Vatican to hold a conclave before Easter to elect a new pope, since the traditional mourning time that would follow the death of a pope doesn't have to be observed.
It will also allow Benedict to hold great sway over the choice of his successor. He has already hand-picked the bulk of the College of Cardinals — the princes of the church who will elect the next pope — to guarantee his conservative legacy and ensure an orthodox future for the church.
"Without doubt this is a historic moment," said Cardinal Christoph Schoenborn, a protege and former theology student of Benedict's who himself is considered a papal contender. "Right now, 1.2 billion Catholics the world over are holding their breath."
President Barack Obama said in a statement that he and wife Michelle remembered their meeting with him in 2009 and he had "appreciated our work together" over the past four years.
"The Church plays a critical role in the United States and the world, and I wish the best to those who will soon gather to choose His Holiness Pope Benedict XVI's successor," Obama said.
Cardinal Andre Vingt-Trois, the archbishop of Paris, called Benedict's decision a "liberating act for the future," saying popes from now on will no longer feel compelled to stay on until their death.
"One could say that in a certain manner, Pope Benedict XVI broke a taboo," he told reporters in Paris.
There are several papal contenders in the wings, but no obvious front-runner — the same situation when Benedict was elected pontiff in 2005 after the death of Pope John Paul II.
The Vatican stressed that no specific medical condition prompted Benedict's decision, that he remained fully lucid and took his decision independently.
"Any interference or intervention is alien to his style," Vatican spokesman the Rev. Federico Lombardi said.
It has been obvious to all that the pope has slowed down significantly in recent years, cutting back his foreign travel and limiting his audiences. He now goes to and from the altar in St. Peter's Basilica on a moving platform to spare him the long walk down the aisle. Occasionally he uses a cane.
His 89-year-old brother, Georg Ratzinger, said doctors had recently advised the pope not to take any more trans-Atlantic trips.
"His age is weighing on him," Ratzinger told the dpa news agency. "At this age my brother wants more rest."
Benedict emphasized that carrying out the duties of being pope requires "both strength of mind and body."
"After having repeatedly examined my conscience before God, I have come to the certainty that my strengths due to an advanced age are no longer suited to an adequate exercise of the Petrine ministry," he told the cardinals.
"In order to govern the bark of St. Peter and proclaim the Gospel, both strength of mind and body are necessary — strengths which in the last few months, have deteriorated in me to the extent that I have had to recognize my incapacity to adequately fulfill the ministry entrusted to me," he said.
Popes are allowed to step down; church law specifies only that the abdication be "freely made and properly manifested." But only a handful have done it.
The last pope to leave his post was Pope Gregory XII, who stepped down in 1415 in a deal to end the Great Western Schism among competing papal claimants. Celestine V in 1294 is universally recognized as the last pope to abdicate his position, NBC News reported. Dante placed him in hell for it.
When Benedict was elected at age 78, he was the oldest pope chosen in nearly 300 years. At the time, he has already been planning to retire as the Vatican's chief orthodoxy watchdog to spend his final years writing in the "peace and quiet" of his native Bavaria.
On Monday, Benedict said he would serve the church for the remainder of his days "through a life dedicated to prayer." The Vatican said immediately after his resignation, Benedict would go to Castel Gandolfo, the papal summer retreat south of Rome, and then would live in a cloistered monastery.
During his tenure, Benedict charted a very conservative course for the church, trying to reawaken Christianity in Europe where it had fallen by the wayside and return the church to its traditional roots, which he felt had been betrayed by an incorrect interpretation of the modernizing reforms of the Second Vatican Council.
His efforts though, were overshadowed by a worldwide clerical sex abuse scandal, communication gaffes that outraged Jews and Muslims alike and, more recently, a scandal over leaked documents by his own butler. Many of his stated priorities as pope also fell short: he failed to establish relations with China, heal the schism and reunite with the Orthodox Church, or reconcile with a group of breakaway, traditionalist Catholics.
Still, most Vatican watchers saw his decision as the best thing to do for the church given his diminished capacities.
"It is an act ultimately of responsibility and love for the church," said the Rev. John Wauck, an Opus Dei priest who teaches at the Pontifical Holy Cross University in Rome.
All cardinals under age 80 are allowed to vote in the conclave, the secret meeting held in the Sistine Chapel where cardinals cast ballots to elect a new pope. As per tradition, the ballots are burned after each voting round; black smoke that snakes out of the chimney means no pope has been chosen, while white smoke means a pope has been elected.
There are currently 118 cardinals under age 80 and thus eligible to vote, 67 of whom were appointed by Benedict. However, four of them will turn 80 before the end of March. Depending on the date of the conclave, they may or may not be allowed to vote.
Benedict in 2007 passed a decree requiring a two-thirds majority to elect a pope, changing the rules established by John Paul who had decided that the voting could shift to a simple majority after about 12 days of inconclusive voting. Benedict did so to prevent cardinals from merely holding out until the 12 days had passed to push through a candidate who only had only a slim majority.
Contenders to be his successor include Cardinal Angelo Scola, archbishop of Milan, Cardinal Christoph Schoenborn, the archbishop of Vienna, and Cardinal Marc Ouellet, the Canadian head of the Vatican's office for bishops.
Longshots include Cardinal Timothy Dolan of New York. Although Dolan is popular and backs the pope's conservative line, the general thinking is that the Catholic Church doesn't need a pope from a "superpower."
Given half of the world's Catholics live in the global south, there will once again be arguments for a pope to come from the developing world.
Cardinal Antonio Tagle, the archbishop of Manila, has impressed many Vatican watchers, but at 56 and having only been named a cardinal last year, he is considered too young.
Cardinal Peter Kodwo Appiah Turkson of Ghana is one of the highest-ranking African cardinals at the Vatican, currently heading the Vatican's office for justice and peace, but he's something of a wild card.
There are several "papabile" in Latin America, though the most well-known, Cardinal Oscar Andres Rodriguez Maradiaga of Honduras, is considered far too liberal to be elected by such a conservative College of Cardinals.
Whoever it is, he will face a church in turmoil: The sex abuse scandal has driven away thousands of people, particularly in Europe, from the church. Rival churches, particularly evangelical Pentecostal groups in the developing world, pose new competition. And as the pope himself has long lamented, many people in an increasingly secular world simply believe they don't need God.
The timing of Benedict's announcement was significant: Lent begins this week on Ash Wednesday, the most solemn period on the church's calendar that culminates with Holy Week and Easter on March 31. It is also the period in which the world witnessed the final days of John Paul's papacy in 2005.
The timing means that there will be a very big spotlight cast on Cardinal Gianfranco Ravasi, the Italian head of the Vatican's culture office who has long been on the list of "papabile." Benedict selected him to preside over the Vatican's spiritual exercises during Lent.
By Easter Sunday the Catholic Church will have a new leader, a potent symbol of rebirth in the church that echoes the resurrection of Christ celebrated on Easter.
Benedict, then known as the former Cardinal Joseph Ratzinger, had an intimate view as Pope John Paul II, with whom he had worked closely for nearly a quarter-century, suffered through the debilitating end of his papacy.
Benedict himself raised the possibility of resigning if he were simply too old or sick to continue on, when he was interviewed in 2010 for the book "Light of the World."
"If a pope clearly realizes that he is no longer physically, psychologically and spiritually capable of handling the duties of his office, then he has a right, and under some circumstances, also an obligation to resign," Benedict said.
But he stressed that resignation was not an option to escape a particular burden, such as the sex abuse scandal.
"When the danger is great one must not run away. For that reason, now is certainly not the time to resign. Precisely at a time like this one must stand fast and endure the situation."
The announcement took the Vatican — and the rest of the world — by surprise.
Monday was a holiday at the Vatican, although some cardinals to name new saints. The announcement in Latin took cardinals in the room by surprise; others inside the Vatican who were listening in to the closed-circuit recording struggled to understand the Latin.
"All the cardinals remained shocked and were looking at each other," said Monsignor Oscar Sanchez of Mexico who was in the room when Benedict made his announcement.
Benedict was born April 16, 1927 in Marktl Am Inn, in Bavaria, but his father, a policeman, moved frequently and the family left when he was 2.
In his memoirs, Benedict dealt what could have been a source of controversy had it been kept secret — that he was enlisted in the Nazi youth movement against his will when he was 14 in 1941, when membership was compulsory. He said he was soon let out because of his studies for the priesthood. Two years later he was drafted into a Nazi anti-aircraft unit as a helper. He deserted the German army in April 1945, the waning days of the war.
He called it prophetic that a German followed a Polish pope — with both men coming from such different sides of World War II.
Benedict was ordained, along with his brother, in 1951. After spending several years teaching theology in Germany, he was appointed bishop of Munich in 1977 and elevated to cardinal three months later by Pope Paul VI.
John Paul named him leader of the Congregation for the Doctrine of the Faith in 1981 and he took up his post a year later. Following John Paul's death in 2005, he was elected pope April 19 in one of the fastest conclaves in history, just about 24 hours after the voting began.