The topic of the current volume of the Yearbook is constitutional advice. This topic has been relatively underexplored by legal scholarship, much like the place of cities in constitutional law, which readers may recall was the focus of the previous edition. We prefer a broad understanding of constitutional advice as encompassing the seeking and rendering of advice on constitutional topics, including the study of the processes and institutions that enable and contextualise such advice. This understanding immediately calls to mind two interrelated questions, viz. what is meant by ‘advice’, and what may be considered to be ‘constitutional topics’ that the advice relates to