DONG-A UNIVERSITY | Studio Leader : Cha, Youn Suk The most important feature of modern cities and architecture is diversity, and the collection of diversity appears as a result of the Collective City. To realize this, it is essential to understand that the most important element of Collective City is the diverse individuals and their groups. Because we believe that understanding people and their lives will be the first step in creating a Collective City where democratic diversity is. The purpose of this studio is to examine sustainability in another sense by preparing for an aging society and proposing several social and physical alternatives required for older people. As well as architectural proposals to restore the historical value of Somaksa, a historical resource of Somak Village, we are going to present programs that will not simply create a comfortable environment for the elderly in the village, but also create an environment for the elderly to live on their own and create economic value. It is also intended to suggest the direction that Collective City should be oriented through method and process to realize. We hope our plan will be a good alternative to our urban problem.