Queen Elizabeth II of Britain attended a thanksgiving service Sunday as tens of thousands of her countrymen celebrate her 50 years on the throne.
Sunday was a day of reflection for Queen Elizabeth, who attended a special thanksgiving service at Saint George's Chapel in Windsor Castle.
The service was marked by the signing of a personal covenant by Christian leaders in Britain, committing themselves to work for unity among the churches.
The document was signed by the Anglican leader, Archbishop of Canterbury George Carey, and the Roman Catholic Cardinal Cormac Murphy O'Connor.
Archbishop Carey told British radio the goal of Christian unity will take time to accomplish. "The eventual journey we trust will lead to one church in this land, but I don't expect it in my lifetime," said the 66-year-old churchman.
For Queen Elizabeth, Monday will see a return to the more secular celebrations of her Golden Jubilee, as she will host a pop music concert at Buckingham Palace.
Performers will include British rock legends Paul McCartney, Elton John and Eric Clapton.
As with a classical music concert at the palace on Saturday night, the 12,500 invited guests have been selected by lottery from two million entrants.
Tens of thousands of spectators will be able to watch the concert on giant screens outside the palace, and it will be broadcast nationwide.
On Tuesday, Queen Elizabeth will attend a service at St. Paul's Cathedral in London. Later there will be a giant parade in the city, a fly-by over Buckingham Palace and a massive fireworks display.