Karl Wilhelm Friedrich Schlegel (/ˈʃleɪɡəl/; German: [ˈfʁiːdʁɪç ˈʃleːgl̩]; 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. As a young man he was an atheist, a radical, and an individualist. In 1808, the same Schlegel converted to Catholicism. Two years later he was a diplomat and journalist in the service of the reactionary Clemens von Metternich, surrounded by monks and pious men of society.