EN
The paper surveys the role and localisation of words and word classes in earlier and more recent descriptive and historical grammars of various languages. Where and how word classes are discussed in the individual grammars reflects, of course, their role in sentence or text formation.The paper also investigates the background of the issue of word classes being discussed within morphology, or as a chapter of syntax, discusses cases where there is no separate chapter on (the history of) parts of speech in a given grammar, but rather these issues occur scattered in various places, and finally: the advantages of a unified and concentrated discussion of word classes as a separate chapter of grammar.