The book Public Spaces – What for? Wozu? Pourquoi? presents essays and discussions about the significance of one’s own design aspirations for the planning of public spaces. It contains detailed descriptions of the Trammplatz in Hanover and the Platz der Fünf Kontinente in Esch-sur-Alzette, Luxembourg, with contributions by Stefan Schostok, the senior mayor of the regional capital Hanover, as well as Uwe Bodemann, the Head of Municipal Planning in Hanover, and Vera Spautz, the mayoress of Esch-sur-Alzette, along with Luc Everling, the urban architect from Esch, Dörte Eggert-Heerdegen, and Kamel Louafi.