Western societies over the last few decades have seen an increased interest in questions of group belonging and group identities, including ethno-national groups. According to essentialising or constructivist paradigms, belonging to a national group is commonly conceptualised in the range of objective versus subjective criteria, where objective entails ascription and subjective, self-identification. This paper suggests disentangling the paired dimensionsobjective and other-classification versus subjective and self-classification-by analysing the late Habsburg Empire. I argue that the introduction of national registers in the new provincial constitutions and electoral laws of Moravia, Bukovina and Galicia accelerated an objective understanding of nationality and increasingly favoured other-classification over self-classification in cases where national belonging had become an administrative category. Yet, to do justice to the individual's subjective feelings, authorities were supposed to investigate objectively a citizen's subjective identification-a procedure that can be termed "objectivisation." Such objectivising procedures thus reconciled an individual's subjective identification with an increasingly objective understanding