Mayoral Conference on the City Prosperity Initiative has started on 28 July 2015, in the UN Office in Vienna. Mehmet Duman, UCLG-MEWA Secretary General, participated in the conference. While Eduardo López Moreno, UN-Habitat Director of Research and Capacity, gave a speech on Sustainable Development Goals, Fatma Şahin, Mayor of Gaziantep mentioned topics regarding urban alliance. The conference is still continuing.