The aim is to study how, in each country represented by the different partners schools, these three concepts make sense in relation to one another. Indeed, each individual has an identity at birth. This is partly built (to some extent in relation to family ties ) by its membership in a nation. This nation is partly or mainly included in a state that grants citizenship, which in turn, generally at the age of 18, gives new outlines to the individual's identity . Is it then citizenship that takes precedence over nationality or the other way around? What about the supra-national and supra-state of Europe as a whole ? Does it define a new citizenship? Does this in turn influence identity?