In this paper, I provide examples from Germanic of cyclical changes involving the nominal phrase. Using a DP structure, it can be observed that demonstratives in specifier positions of the DP are reanalyzed through time as articles in head positions. The change from demonstrative to article is known as the definiteness cycle and described in Greenberg 1978 and Lyons 1999. Providing examples from Old Norse, Old English, and Afrikaans, I suggest an explanation for the cycle in terms of a cognitive principle, Feature Economy, that assists in language acquisition and hence language change.Many thanks to Werner Abraham, Johanna Wood, Jan Terje Faarlund, two anonymous referees, and especially to Terje Lohndal for helpful discussion and comments.