In Photos: Solemn Procession of Queen Elizabeth's Coffin to Westminster Hall

Royal guards march on the day the coffin of Britain's Queen Elizabeth is transported from Buckingham Palace to the Houses of Parliament for her lying in state, in London, Sept. 14, 2022.

The coffin of Queen Elizabeth II, adorned with a Royal Standard and the Imperial State Crown and pulled by a Gun Carriage of The King's Troop Royal Horse Artillery, is pictured during a procession from Buckingham Palace to the Palace of Westminster in London, Sept. 14, 2022.

Britain's King Charles III, Princess Anne, Prince Andrew and Prince Edward follow the coffin of Queen Elizabeth II during a procession from Buckingham Palace to Westminster Hall in London, Sept. 14, 2022.

The coffin of Queen Elizabeth II leaves Buckingham Palace for Westminster Hall in London, Sept. 14, 2022.

Prince Harry and Prince William follow the coffin of Queen Elizabeth II during a procession from Buckingham Palace to Westminster Hall in London, Sept. 14, 2022.

Grenadier Guards flank the coffin of Queen Elizabeth II during a procession from Buckingham Palace to Westminster Hall in London, Sept. 14, 2022.

The coffin of Queen Elizabeth II is transported from Buckingham Palace to Westminster Hall in London, Sept. 14, 2022.

The coffin of Queen Elizabeth II, draped in the Royal Standard with the Imperial State Crown placed on top, is carried on a horse-drawn gun carriage of the King's Troop Royal Horse Artillery, outside Buckingham Palace, London, Sept. 14, 2022.