Abstract. In the current political and economic context, highly sensitive, determined and influenced by the financial crisis which spreads all part of globalization coordinates, the state administrations themselves are put in a position to find new and effective solutions, in order to satisfy a wide range of interests.

One of the possible ways reserved to administrative systems, with priority to those attached to the European continental area values, is the collaborative administration, based on strengthening cooperation and partnership between the public authorities which are animated by common interests both in national and foreign, and in internal and international collaboration.

From this point of view, the current scientific approach aims to reflect on the reality of institutional and partnership relations that the Municipality of Bucharest - capital of Romania - conducts in its relations with other European cities and large municipalities, such as the Municipality of Rome (Italy). The purpose of these relations regard multiple activities such as local services, high quality serving of the members of the local community, according to the principle and essential value of European Administrative Space - i.e. local autonomy.

Keywords: territorial collectivities, collaborative administrations, local autonomy, Bucharest City, Rome City.