Prince Philip was admitted to King Edward VII Hospital in London on Friday (December 20). The palace released a statement about the Duke of Edinburgh's health, as well, informing the public he was taken to the hospital for observation and treatment in relation to a pre-existing condition.
The 98-year-old royal was not taken to the medical center via ambulance as it was a pre-planned visit. According to BBC royal correspondent Nicholas Witchell, Prince Philip was seen walking into the hospital without assistance.
"The admission is a precautionary measure, on the advice of His Royal Highness' Doctor," the palace statement explained. The Duke is expected to remain in the hospital for a few days.
Queen Elizabeth is at her Sandringham Estate in Norfolk. The royal family travels there every year for their annual Christmas celebrations. It's not clear at this time whether the Duke of Edinburgh will be released in time for the holidays. He missed out on the celebrations last year, however, he was believed to be in good health. At 98-years-old, Prince Philip is retired from official royal business.