Conservative German cardinal Joseph Ratzinger was elected Pope yesterday in a surprise choice that delighted traditionalist Roman Catholics but stunned moderates hoping for a more liberal papacy.

Cardinal Ratzinger, 78, the Church's 265th Pontiff, will take the name of Benedict XVI. He is expected to defend Pope John Paul's strict orthodox legacy and reject changes in Catholic doctrine. He is the oldest man to be elected Pope for three centuries and the first German Pontiff for a millennium.

The speed of the election, on only the second day of a secret cardinals conclave, and its result were both a surprise.

Many Vatican experts had said Cardinal Ratzinger, John Paul's tough doctrinal watchdog for 23 years, was too divisive and too old to become Pope.

They had predicted he would have to cede to a more conciliatory compromise figure during the conclave, although John Paul had appointed all but two of the cardinal electors and one of those two was Cardinal Ratzinger himself.

The white-haired new Pope appeared on the balcony of St Peter's Basilica soon after his election, smiling broadly and greeting tens of thousands of cheering faithful.

"I entrust myself to your prayers," he said as the crowd chanted "Papa! Papa! Papa!" and waved umbrellas and flags. Some climbed lamp posts and fountains in the cobblestone square for a better view.

Pope Benedict was showered with congratulations from foreign and religious leaders but the election was greeted with consternation by those hoping for a relaxation in John Paul's strict rule over the world's 1.1 billion Catholics.

"We consider the election of Ratzinger is a catastrophe... We can expect no reform from him in coming years... I think even more people will turn their back on the Church," said Bernd Goehring, of the German ecumenical group Kirche von Unten.

Even in St Peter's Square, some of the celebrations were tempered by fear of widening divisions in the Church.

"It's a historic moment, but a very sad one. He is even more conservative than John Paul II. All he knows to do is condemn, condemn, condemn," said Agusti Capdevila from Barcelona.

Pope Benedict's election by a conclave meeting in the Vatican's frescoed Sistine Chapel was signalled by white smoke from the chapel chimney and the tolling of the bells of St Peter's.

The election indicated both that the cardinals wanted to maintain Pope John Paul's strict Church orthodoxy and also to have a short, transitional papacy after the Polish Pope's 26-year reign - the third longest in Church history.

"I was surprised for a couple of reasons. One is his age... The second is that I thought he might have been too much of a polarising person. But that may not be the perception that was shared by the cardinals," said Lawrence Cunningham, theology professor at the University of Notre Dame in Indiana.

Cardinal Ratzinger, dean of the cardinals, had dominated the Vatican since the death of Pope John Paul on April 2. He presided over the funeral Mass and daily meetings of cardinals since then.

He used a homily at a Mass before the conclave to issue a stern warning that godless modern trends must be rejected. The address was widely seen as promoting his candidacy.

He was expected to take a tough line against reformist trends in Europe and North America. In a Good Friday Mass this year he said: "How much filth there is in the Church, even among those who, in the priesthood, should belong entirely to Him."

Cardinal Ratzinger's stern leadership of the Congregation of the Doctrine of the Faith, the modern successor to the Inquisition, delighted conservative Catholics but upset moderates and other Christians whose churches he described as deficient.

Before St Peter's bells confirmed Pope Benedict's election, there were 10 minutes of confusion over the colour of the smoke, which initially seemed grey.

But even before the bells pealed, thousands of faithful in the square cheered and applauded, yelling "A pope, a pope!"

It was only the third time in a century that a Pope had been chosen on the second day of a conclave. The new Pope had to win a two-thirds majority of the 115 red-robed cardinals.

In Germany, church bells rang out and Catholics streamed into churches to celebrate Pope Benedict's election.

The choice of Cardinal Ratzinger dashed hopes of a Pope from the developing world, where two-thirds of Catholics now live. He is expected to pay particular attention to the decline of faith and spread of secularism in Europe.

As John Paul's doctrinal overseer, Cardinal Ratzinger disciplined Latin American "liberation theology" theologians, denounced homosexuality and gay marriage and pressured Asian priests who saw non-Christian religions as part of God's plan for humanity.

In a document in 2000, Cardinal Ratzinger branded other Christian churches as deficient - shocking Anglicans, Lutherans and other Protestants in ecumenical dialogue with Rome for years.

Cardinal Ratzinger was the oldest cardinal to be named Pope since Clement XII, who was also 78 when he became pope in 1730. He is the first German Pope since Victor II (1055-1057).

Before the conclave door shut on Monday, Cardinal Ratzinger made a final appeal to his fellow electors to protect traditional teachings and to shun modern trends.

He made no mention of the challenges that other cardinals and ordinary Catholics say should top the agenda such as poverty, Islam, science, sexual morality and Church reform.

Born in Bavaria on April 16, 1927, the son of a police chief, he served in the Hitler Youth during World War II when membership was compulsory, according to his autobiography.

But he was never a member of the Nazi party and his family opposed Adolf Hitler's regime, biographers have said.

Cardinal Ratzinger later became a leading theology professor and then archbishop of Munich before taking over the Congregation for the Doctrine of the Faith in 1981.

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