The Copenhagen School of Linguistics, also known as the Linguistic Circle of Copenhagen, was founded by Louis Hjelmslev and Viggo Brøndal in the mid-20th century. It developed Hjelmslev's theory of glossematics, which aimed to further structuralism by analyzing language as a formal system. The school was influential in linguistic structuralism along with the Geneva and Prague Schools. It studied the formal properties of language and their interrelations through successive works published by its members. In 1989, a new generation of linguists inspired by cognitive linguistics founded the School of Danish Functional Grammar to continue the Copenhagen School's tradition.