'Illyria' or 'Illyrian' may refer to:
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Illyria, a region in southern Europe inhabited in antiquity by the
Illyrians, who were conquered by the Romans in the third and second centuries B.C., forming the Roman province of
Illyricum.
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Illyrian languages, a group of ancient dialects that were spoken by the Illyrians.
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Illyrian provinces, a division of the First French Empire near the Adriatic Sea from 1809, when they were formed from various ceded Austrian territories, to 1814, when they were returned to the Austrian Empire and mostly reconstituted as the
Kingdom of Illyria (1814–1849).
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Illyrian movement, a cultural and literary movement among the South Slavs in the Habsburg Empire in the nineteenth century.
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Illyria (software), an example computer programming language implemented under
Lisp.
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Illyria (Buffyverse), a fictional character from
Angel TV series.
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William Shakespeare's
Twelfth Night is set in a county called Illyria.
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1160 Illyria, an
asteroid discovered by
Karl Wilhelm Reinmuth