The title of "Most Eminent Imperial and Royal Highness" is a style within the Pontifical Imperial State of Rome-Ruthenia and the United Roman-Ruthenian Church exclusively used by the specific Prince-Electors (if clerics) and their consorts who comprise the honourary members of the Pontifical and Imperial Household. These are the Electors of Mainz, Köln, and Trier. It also includes the Elector of Würzburg, which is a personal title of the Prince-Bishop of Rome-Ruthenia, if the Prince-Bishop permits it to be used by another. Wives of Electors follow the style usage of their husbands.
This style is also used by a Cardinal who is otherwise personally entitled to the style of Imperial and Royal Highness.
The members of the families of the Electors do not use this style, but instead use the style of Serene Highness unless entitled to a higher style.
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Pontifical Imperial State
of Rome-Ruthenia
United Roman-Ruthenian Church