Royal we

Document of 1750 signed by George II of Great Britain, using the royal we in German: Gegeben auf Unserm Palais zu St. James den 3/14ten April des 1750ten Jahres Unsers Reiches im Dreÿ und Zwantzigstem. George R ("Issued in Our Palace of St. James, on 3rd/14th April in the 1750th year in the three and twentieth of Our Reign. George R")
Latin document of 1249–50 issued by Henry III of England; he uses the phrase Mandamus vobis ("We command you").
2024 Commission of Australian Governor-General Sam Mostyn, issued by Charles III

The royal we, majestic plural (pluralis majestatis), or royal plural, is the use of a plural pronoun (or corresponding plural-inflected verb forms) used by a single person who is a monarch or holds a high office to refer to themselves. A more general term for the use of a we, us, or our to refer to oneself is nosism.