Covid-19 has challenged fundamental assumptions about the world’s largest cities. Cities across the world have seen an unprecedented level of change: initially this was in response to massive, enforced, changes to behaviour, but as Covid recedes, cities across the world have become creative in their recoveries. Urban life is coming back with innovations in transport pricing, new designs for street usage, and fundamental questions about long-term demand for all forms of urban infrastructure. By bringing together voices from major cities around the world, we sparked discussions about how global cities continue to reinvent themselves post-Covid.