The rhyme royal stanza consists of seven lines, usually in iambic pentameter.
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Chaucer first used the rhyme royal stanza in his long poems Troilus and Criseyde and Parlement of Foules.
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Like many stanzaic forms, rhyme royal fell out of fashion during the Restoration, and has never been widely used since.
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The poem is in the form of a dream vision in rhyme royal stanza and is interesting in that it is the first reference to the idea that St. Valentine's Day was a special day for lovers.
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As a result, historically monosyllabic tile, boil and fowl come to rhyme with historically disyllabic dial, royal and vowel.
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Some forms of poetry carry a consistent and well-defined rhyming scheme, such as the chant royal or the rubaiyat, while other poetic forms have variable rhyme schemes.