But he also reached out to American secularists, calling the United States, "a nation of Christians and Muslims, Jews and Hindus — and nonbelievers." The Center for Inquiry and the Council for Secular Humanism, based in Amherst, N.Y., called recognition in the inaugural address "truly historic and remarkable."
Evangelical pastor Rick Warren, whose participation drew criticism from liberals and gay rights groups, directly invoked Jesus as expected in his invocation, but did so personally.
"I humbly ask this in the name of the one who changed my life," he prayed.
He also quoted from the most important prayer in Judaism, the Sh'ma, when he said, "Hear O Israel, the Lord is our God. The Lord is One," and he called God "the compassionate and merciful one," a phrase from Muslim devotion.
"His was as inclusive a prayer as an evangelical can give," said Richard Mouw, president of Fuller Theological Seminary, a leading evangelical school in Pasadena, Calif.
The Rev. Joseph Lowery, a United Methodist considered the dean of the civil rights movement, focused on poverty and social justice.
"Lord, on the complex arena of human relations, help us to make choices on the side of love, not hate. On the side of inclusion, not exclusion. Tolerance, not intolerance," he said.
He called the stage where Obama took his oath "this mountaintop," a reference to the Rev. Martin Luther King Jr.'s final speech. Lowery also quoted from the song known historically as "The Negro National Anthem."
"God of our weary years, God of our silent tears," he said, at the start of his benediction.
Prayers at inaugural ceremonies generally draw little attention, but this year was different. Obama spoke of his faith openly during the election, trying to change the image of the Democratic Party as hostile to religious voters. He has also welcomed nonbelievers, who tend to vote Democratic, in his speeches and public appearances since his earliest days of campaigning.
His supporters had been deeply upset by the prominence of the Christian right during the administration of President George W. Bush, and they watched to see what religious signals Obama would send at his swearing-in.
Warren is a Southern Baptist who wants to broaden the evangelical agenda to include environmental protection, fighting poverty and ending AIDS. He also backed Proposition 8, which banned gay marriage in his home state of California. Gay rights advocates and liberals were outraged that Obama had given Warren a place of honor at the ceremony.
Obama, who prays with Warren, said he wanted the event to reflect diverse views and insisted he remains a "fierce advocate" of equal rights for gays. The new president had also asked Bishop Gene Robinson of New Hampshire, the first openly gay Episcopal bishop, to give the opening prayer Sunday at the inaugural-kickoff event at the Lincoln Memorial.
In his invocation Tuesday, Warren did not refer to the controversy. However, he asked God to forgive "when we fail to treat our fellow human beings and all the Earth with the respect that they deserve." He also prayed for "civility in our attitudes, even when we differ."
Warren said Jesus' name in four languages — English, Spanish, Arabic and Hebrew — and ended his invocation with "The Lord's Prayer," from the Sermon on the Mount.
Rabbi Gary Greenebaum, who leads interreligious outreach for the American Jewish Committee, called Warren's invocation "inclusive even as it was slightly exclusive," for praying in Jesus' name and ending with "The Lord's Prayer."
"I don't think the language of the prayer itself is offensive, but the context of the prayers, coming from Christian Scripture, is somewhat exclusive," Greenebaum said.
Some atheists and agnostics had sued unsuccessfully ahead of the swearing-in to keep references to God out of the event.
Obama began the day at St. John's Episcopal Church, where presidents since 1933 have prayed before being sworn in. Several evangelical clergy spoke at the service, including the Rev. Luis Leon and the Rev. Joel Hunter of Northland church in Longwood, Fla. Bishop T.D. Jakes, a Dallas megachurch pastor, gave the sermon.
Mouw said the day sent a clear message: A liberal Democrat can be pious, and in the Obama administration, faith will have a place.
