Re Carlo III è stato incoronato

Forma passiva
Passive form

“Re Carlo III del Regno Unito è stato incoronato”
(King Charles III of the United Kingdom has been crowned)

The passive form in this sentence is “è stato incoronato,” which indicates that the subject (Re Carlo III) is the recipient of the action. 

In this case, the focus is on the fact that Carlo III has been crowned, rather than who performed the action of crowning him.

Let’s see other examples:

• Il libro è stato scritto da un famoso autore. (The book has been written by a famous author.)
• La torta è stata mangiata dai bambini. (The cake has been eaten by the children.)
• La casa è stata costruita nel 1950. (The house was built in 1950.)