A coronation was a ceremony in which leaders, usually monarchs, were crowned and formally invested with the power of the office.
The Doctor was invited to the coronation of Elizabeth I, which he attended. (AUDIO: The Marian Conspiracy)
In their third incarnation, the Doctor claimed to have attended the coronation of Queen Victoria. (TV: The Curse of Peladon)
In June 1953, the Wire attempted to take the energy from the millions of humans watching the coronation of Elizabeth II on their televisions, but the Tenth Doctor foiled her plans. (TV: The Idiot's Lantern)
After Elizabeth II was restored to the throne after being briefly deposed by Ice Lord Xznaal in May 1997, her recoronation, the only recoronation in the history of the United Kingdom, was held on 23 November. (PROSE: The Dying Days)
On Gallifrey, the Lord President was presented with the Crown of Rassilon at his coronation. The Sash of Rassilon was usually worn at the ceremony. (TV: The Invasion of Time)