Fulco Treffers is an architect and urban researcher from the Netherlands. He is the founder of 12N, a studio of urban design. His works are mostly connected with city development and social housing. During the residence program in Mariupol the architect will work with the “camp” concept. Fulco believes that the term has several meanings. In particular, Fulco refers to the tourists tradition of the city of Mariupol and the coastline of the Azov Sea. On the other hand, the concept is connected to military operations in the ATO zone and the fact that Mariupol hosts refugees from other cities affected by the war. Thus, the term ‘camp’ attains a militaristic character. At the end of the research Fulco will devise a line of camp (meeting places) sites which will “defend the city” with social and cultural means.