In this paper, the relation between national or european identification and acceptance of natural protected areas (NPA) was investigated. We examined how the level of identity salience, the type of proposing authority and the modality of park’s management interact in shaping support for NPA. To test this hypothesis, 4 scenarios describing the institution of a natural park proposed either by a national or by an european authority were set up. In particular: -Scenario 1 described the institution of a park proposed by a national authority with the presence of conflicts between the local communities and the public authorities responsible for the park institution. -Scenario 2 described the institution of a park proposed by a national authority without the presence of conflicts between the local communities and the public authorities responsible for the park institution. -Scenario 3 described the institution of a park proposed by an european authority without the presence of conflicts between the local communities and the public authorities responsible for the park institution. -Scenario 4 described the institution of a park proposed by an european authority with the presence of conflicts between the local communities and the public authorities responsible for the park institution. N = 93 residents in Rome (Italy) participated in the study, purposively balanced for the main socio-demographic characteristics and randomly assigned to one of two experimental conditions of identity salience: 1) national identity salient; 2) european identity salient; Identity salience was manipulated via a “self-definition task” previously used in the literature. Each participant was then asked to evaluate 2 out of 4 scenarios, according to a nested factorial design, by responding to 7 Likert-type items (Cronbach’s alphas over .85). The main prediction of this study involves a 3-way interaction between “level of identity salience” (national vs. european), “park’s proponent authority” (national vs. european) and “park management modality” (with vs. without conflicts). Preliminary results confirmed the expected main effect of management modality upon park’s acceptance. Scenarios describing the presence of conflicts between the proponent authority and local communities received higher degrees of support. The test of the 3-way interaction is still in progress. Theoretical and practical implications will be discussed.