The 'majesty' group
These nouns are used to address an important person formally. They are used with the determiner your. (See also Section 15, meaning group 63.)
Eminence Excellency Grace Highness Holiness Honour Ladyship Lordship Majesty Royal Highness
Your Highness, the law is very clear regarding threats to the Empire.
I quite agree, Your Majesty.