//Ernst May's plan for Frankfurt, Martin Wagner's Berlin, Fritz Schumacher's Hamburg, and Cornelis van Eesteren's Amsterdam are the most important chapters in the history of modern urban planning. Yet beside the oases of order that were the Sieldungen - true constructed utopias, on the margins of an urban reality little affected by them - the old cities continued to accumulate and multiply their contradictions. And for the most part, these contradictions would soon appear more vital then the tools established by the architectural milieu to control them.//
[ Hays, K., Michael, Architecture theory since 1968, The MIT Press, 1998. / p. 23 ]