"Installed" wouldn't be a good term either as the King was installed last year. This was his coronation (which sounds strange taking into consideration that there is no actual crown but another term was needed to show that it was a different occasion from the last one). So let's say "The King's coronation" to avoid the confusion concerning his being crowned or not.
--Previous Message--
: How can the King have been crowned, there is
: no crown?