Once inside he will sit on the Coronation Chair, which is more than 700 years old and will temporarily house a block of Scottish sandstone known as the Stone of Destiny.
He will put on, at some point, a 200-year-old cloak that is woven from gold cloth, embroidered with roses, thistles and shamrocks and lined with red silk.
Britain’s monarchy and the country’s past are inextricably linked, and a coronation is an opportunity for the institution to nod at history and hope that history nods back.
A successful coronation telegraphs to the world — and reflects back to as many Britons as possible — a version of who we’d like to think we are.
The problem is that this coronation is arriving at a time when it’s not exactly clear what that is.