Karl Wilhelm Friedrich (after 1814: von) Schlegel (10 March 1772 – 12 January 1829), usually cited as Friedrich Schlegel, was a German poet, literary critic, philosopher, philologist and Indologist. With his older brother, August Wilhelm Schlegel, he was one of the main figures of the Jena romantics. He was a zealous promoter of the Romantic movement and inspired Samuel Taylor Coleridge, Adam Mickiewicz and Kazimierz Brodziński. The first to notice what became known as Grimm's law, Schlegel was a pioneer in Indo-European studies, comparative linguistics, and morphological typology.
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