Karl Wilhelm Friedrich (after 1814: von) Schlegel (10 March 1772 – 12 January 1829) 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 promotor of the Romantic movement and inspired Samuel Taylor Coleridge, Adam Mickiewicz and Kazimierz Brodziński. Schlegel was a pioneer in Indo-European studies, comparative linguistics, in what became known as Grimm's law, and morphological typology. As a young man he was an atheist, a radical, and an individualist. Ten years later, the same Schlegel converted to Catholicism. Around 1810 he was a diplomat and journalist in the service of Metternich, surrounded by monks and pious men of society.