This document summarizes Oriana Romano's presentation on circular economy in cities at the 11th OECD WGI Meeting. It discusses that circular economy aims to have resources continually reused and recycled, outlines challenges like population growth and climate change that create opportunities, and notes cities' important roles as promoters and enablers. It also describes measuring cities' circularity, facilitating learning between them, and sharing recommendations to unlock circular potential through a proposed timeline of diagnostic assessments, action plans, and international workshops with the goal of producing reports, case studies, and indicator frameworks.