Karl Brugmann (1849–1919) was a prominent German linguist and a key figure in the Neogrammarian school, which revolutionized historical linguistics in the late 19th century. He served as a professor of Sanskrit and comparative linguistics at the University of Leipzig for much of his career. Brugmann is most recognized for his monumental contributions to Indo-European linguistics, particularly as a principal author of the multi-volume Grundriss der vergleichenden Grammatik der indogermanischen Sprachen ('Outline of the Comparative Grammar of the Indo-Germanic Languages'), an authoritative reference work on Indo-European grammar. His rigorous approach and extensive research significantly shaped the understanding of historical phonology and morphology.