Royal cypher

In modern heraldry, a royal cypher is a monogram-like device of a country's reigning sovereign, typically consisting of the initials of the monarch's name and title, sometimes interwoven and often surmounted by a crown. In the case where such a cypher is used by an emperor or empress, it is called an imperial cypher. In the system used by various Commonwealth realms, the title is abbreviated as R for rex or regina (Latin for king and queen). Previously, I stood for imperator or imperatrix (Latin words for emperor and empress) of India. The cypher is displayed on some government buildings, impressed upon royal and state documents, and is used by government departments.

The use of a royal cypher in the Commonwealth realms originates in the United Kingdom, where the public use of the royal initials dates at least from the early Tudor period, and was simply the initial of the sovereign with, after Henry VIII's reign, the addition of the letter R for Rex or Regina. The letter I for Imperatrix was added to Queen Victoria's monogram after she became Empress of India in 1877. The initials—which had no set pattern or form of lettering laid down— were usually shown in company with the royal arms or crown as on the king's manors and palaces—such as those of Henry VIII on the gatehouse of St James' Palace. The purpose seems to have been simply to identify an individual sovereign, as the royal coat of arms was often used by successive monarchs. The initials were used mostly on government papers, duty stamps and similar objects, and were sometimes surmounted by a stylised version of the Tudor Crown or, more recently, St Edward's Crown. In Scotland, the Crown of Scotland appears in place of the Imperial Crown.

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