The multi family group as a space of meta reflection - Authors describe the process which led to the activation of a multi-family group within a Residential Therapeutic Community for young patients with personality disorder, especially in the borderline spectrum. In the perspective of a transforming intervention which is aimed at fostering mentalization processes, authors highlight that a multi-family group works as a safe enlarged container which enables families to question designations and interactive stiff modalities as well as to stimulate new ways of thinking. Moreover, they believe a multi-familiar group represents a meta-context which allows, on the one hand, to integrate and enrich those elements emerging in different therapeutic community contexts (individual, familiar, group), on the other, it favours the attuning of theoretical frameworks which are different, but which share the idea of focusing on relationships and contexts, rather then on the nature of the disease. Then, authors explore feasible articulations with the theorizations made by García Badaracco of the systemic-familiar thought of Bowen (Differentiation of Self) and Bateson (Ecology of Mind) and the attachment theory, with particular reference to the researches which link the pattern of disorganized attachment and the deficit of mentalization functions, to the borderline disorder. Finally, a clinical case has been reported which clearly describes the multifamily group ability to work as an "amplified mind" allowing a person to think together what he or she could not think on her own.