Simon Unwin is a freelance writer based in Cardiff, UK. He has been a registered architect but concentrates on writing about architectural analysis and design. His publications include six books: Analysing Architecture (Routledge, London, 1997, 2003, 2009, 2014 and 2021); An Architecture Notebook: Wall (Routledge, 2000); Doorway (Routledge, 2007); Twenty-Five+ Buildings Every Architect Should Understand (Routledge, 2010, 2015 and 2023); Exercises in Architecture (Routledge, 2012 and 2022); and T