“…The contributors deliver insightful theoretical approaches and documented empirical case studies, which allows to better grasp the impact of territorial reforms on planning policiesnot to say polities. Most of the papers focus in particular on a regional, intermediate scale, at a time when we can observe a renewed interest for regions, regionalization and regional planning (Perrin 2017;Abels and Battke 2019 ;Seys 2019a, 2019b;Lingua and Balz 2020;Perrin 2021;Harrison, Galland, and Tewdwr-Jones 2021 ;Purkarthofer, Humer, and Mäntysalo 2021;Neuman and Zonneveld 2021).…”