After 10 days of national mourning, Queen Elizabeth II was laid to rest at London's Westminster Abbey.

500 world leaders and foreign officials attended the funeral of the late monarch. There were 2,000 guests who farewelled Britain's longest-reigning monarch.

Hundreds of thousands of mourners flooded the streets and parks of the capital city while millions watched online to see Queen Elizabeth make her final journey back to Windsor Castle, where she is to be buried alongside her late husband.

Here are some of the things that happened on Monday.

President Biden's arrival

President Biden exits a car outside Westminster Abbey before the state funeral of Queen Elizabeth II.
President Biden exits a car outside Westminster Abbey before the state funeral of Queen Elizabeth II. (Hannah McKay/WPA Pool/Getty Images)

The only world leader allowed to attend the queen's funeral was President Biden and his wife. The Bidens traveled to the U.K. on Saturday in a motorcade that took them to the funeral in the presidential limo. The leaders traveled to the funeral by bus.

Biden was given permission to travel to the event in his own car. He returned to Washington, D.C. shortly after the ceremony ended.

King Charles's goodbye note

The flag of the United Kingdom was draped over the queen's coffin. A farewell note from King Charles III was placed on the coffin.

The card was written in honor of Charles R. The Latin word for king is rex.

Prince Harry and Meghan snubbed in seating arrangements

King Charles III and Queen Consort Camilla and other members of the royal family follow behind the coffin of Queen Elizabeth II with the imperial state crown resting on top of it as it departs Westminster Abbey on Monday.
King Charles III and Queen Consort Camilla and other members of the royal family follow behind the coffin of Queen Elizabeth II with the imperial state crown resting on top of it as it departs Westminster Abbey on Monday. (Gareth Cattermole/Getty Images)

Prince Harry and his wife were seated in the second row of the funeral, while his father, King Charles III, Queen consort Camilla, Prince William and Kate were seated in the front row. The queen's son Prince Andrew was stripped of his royal titles due to his friendship with a convicted sex offender.

Harry's cousins, Princesses Beatrice and Eugenie, sat next to the Duke and duchess.

Despite having served the most time in the army, Harry was not allowed to wear his uniform at the funeral.

Sentimental jewelry worn by Catherine and Meghan

From left: Meghan, Duchess of Sussex; Camilla, queen consort; Prince George of Wales, Catherine, Princess of Wales; and Princess Charlotte of Wales. (Samir Hussein/WireImage via Getty Images)

There was a lot of meaning behind the jewelry worn by Kate and the Princess of Wales. Kate was wearing a necklace that was owned by the queen. Her mother-in-law wore the necklace before she died. When it was presented to the queen, it was from Japan. For the queen and Prince Philip's 70th wedding anniversary, and again for the prince's funeral, Kate wore the choker. The pearl drop earrings that Kate wore were a gift to the queen from the ruler of the kingdom.

A pair of earrings were made with diamonds and pearls. She wore them on her first outing with her grandmother-in-law.

Two-minute silence across the U.K.

The queen's funeral cortege borne on the state gun carriage of the Royal Navy travels along the Mall. (Chip Somodevilla/AFP via Getty Images)

The queen's funeral was marked by a two-minute silence across the U.K. Crowds watching the funeral on screens in Hyde Park and other royal parks stood in silence. The end of the silence was followed by a song.