Since 2008, ICLEI’s Cities Biodiversity Center (CBC) has convened successive summits as official parallel events to the Conference on Biological Diversity COP, to enable local and subnational governments engagement. These Summits have resulted in strong political outcomes, including the Quintana Roo (2016) and Sharm El-Sheikh (2018) Communiques, Nagoya Plan of Action on Subnational Governments, Cities and Other Local Authorities for Biodiversity (2011 – 2020), adopted at COP 10 in 2010, and of many decisions on local and subnational governments. Through these outcomes, ICLEI CBC has shaped a global policy environment that supports local and regional governments in their efforts to scale up and mainstream nature in sustainable urban development worldwide. ICLEI has also developed a dedicated website for local and subnational governments to advance the Action Agenda for Nature and People and the post-2020 Global Biodiversity Framework and holds monthly informational webinars. The CBC supports the work of CitiesWithNature.