The concept of heterotopia challenges political theory, which has often focused on utopic thinking. Foucault describes a heterotopia as a heterogenous space that juxtaposes in a single real place several spaces, several sites that are in themselves incompatible. Streets, squares and parks form heterotopias when their utopic purity as public space is juxtaposed with the private spaces created by the cardboard boxes and other temporary shelters of homeless people. Since citizenship has traditionally been thought of as participation in a democratic (...) public sphere, how do heterotopias of homelessness challenge the ideas about citizenship? Based on narrative research with homeless people in Poland, I show how the homeless conceive of their marginality. Their participation or non-participation in democracy is not hidden but, on the contrary, very visible in public spaces where they are included as excluded. (shrink)