King Charles III coronation recap: The biggest moments

Among the foliage decorating the High Altar inside Westminster Abbey are branches from a pair of Dawyck beech trees planted by Charles’ parents, the late Queen Elizabeth II and Prince Philip, in 1978 at Wisley, a Royal Horticultural Society garden.

Throughout the Abbey, over 120 varieties of flowers can be seen. The arrangements were made without the use of single use plastics or floral foam, an ode to Charles’ focus on the environment.

After the coronation, the flowers and branches will be donated to Floral Angels, a nonprofit organization that repurposes flowers for care centers, hospices and shelters, according to Buckingham Palace. Camilla is royal patron for the charity.

U.K. Prime Minister Rishi Sunak stepped up to the podium and gave the first reading from the Epistle to the Colossians, the twelfth book of the New Testament.

The gospel is read by Bishop Sarah Mullally, marking the first time in history a female bishop from the Church of England is participating in a coronation service.

In total, around one dozen clergy members of differing faiths and from across the U.K. are assisting the Archbishop of Canterbury in the service.

Charles pledges the coronation oath

Charles places his hand on the Holy Bible and says, "The things which I have here before promised, I will perform and keep. So help me God."

The king signs an oath, pledging to serve the people and rule according to law.

The coronation oath marks the only time a monarch signs a written obligation to their people, according to ABC News royalty consultant Alistair Bruce.

Following the oath, Charles kneels before the High Altar and prays. Charles’ prayer is inspired by the hymn, “I vow to thee, my country.”