The Copenhagen School is a group of scholars dedicated to the study of linguistics, centered around Louis Hjelmslev (1899–1965) and the Linguistic Circle of Copenhagen (French: Cercle Linguistique de Copenhague, Danish: Lingvistkredsen), founded by him and Viggo Brøndal (1887–1942). In the mid-twentieth century, the Copenhagen school was one of the most important centres of linguistic structuralism, together with the Geneva School and the Prague School. In the late 20th and early 21st centuries, the Copenhagen school's approach to linguistics has evolved from purely structural to functionalist, culminating in Danish functional linguistics—which, despite the "functional" moniker, nonetheless incorporates many insights from the founders of the Linguistic Circle.