:Since their foundation, Kern and Associates have practiced a policy of quality in all their actions. An interaction between accumulated experiences, the various professional competences in the team, technical means, a state of the art computer network and a rich reference documentation, Kern and Associates have a decisive experience in emblematic developments. They are largely implicated in the transformation of the coastline. The study for the masterplan of the Port of FOS organised the components of this 10,000 hectare territory, a definition study for the re-qualification of the maritime façade at the edge of the Port Autonome territory provided the occasion to take part in the huge "Cité de la Méditerranée"; project which covers 75 hectares and sets the scene for the components of the site (accesses and esplanades). The teams of François KERN and Yves LION, architects and urban designers, have been working since 2000 on the project to recover the north shore of Marseilles. These port-city spaces, handed over in 2013, have revealed Marseilles to the whole world under a new light. Therefore Kern & associates received "the best international urban regeneration project MIPIM AWARD" in 2015. The other projects in France are located in Lyon, Calais, La Rochelle, Brest, Hyères, Toulon, Lorient and in other places in the world as Hobart (Australia), Bahia Blanca (Argentina) and Bata (Equatorial Guinea). Our objective is to reflect on urban port interfaces and to think about the mutations of the cities and towns along the coast. The question of territorial sharing and the study of time-shared areas is a theme dear to our workshop. The future will be founded on the relationships that are maintained between territories.