More than twenty years after the fall of the Berlin wall, a number of cities live with walls or fences which impose spatial and political divisions. This paper intends to focus on the partition of the city of Mitrovica (Kosovo), which dates back to the nato intervention in 1999. The partition of this city is emblematic of the division of Kosovo in two distinct communities. The project of building a wall within Mitrovica, proposed by the nato in 2001 encompasses the paradox of the entire intervention in Kosovo: the international goal of promoting a multiethnic Kosovo came to be seen as a policy of ghettoization of the various communities, contributing to the identity crisis that nato originally wanted to subdue.