From an investigation about the catholic church decline, into the possibility of losing its social privileges and places of worship for the lack of faithful. What shapes might this “crisis of catholicism” take within our urban landscape?  A fictional future scenario where the church get back to nomadism and essential principles of its beginning, framing a deinstitutionalized faith at the centre. Inflatable micro-architectures constitute a system of mobile organs approaching the city, emphasizing the humility and the missionary future of catholicism.