The Manica Lunga, created to preserve part of the precious collections of Duke Carlo Emanuele I, and destined, later to be demolished, to make a new wing of the Castle, stands on the open-air atrium in which it is located the work of the artist Pier Paolo Calzolari Colu8mns, 2001, is an installation designed specifically for this space, Three Doric columns, two covered with a carbon black, produced with acetylene flame, and one covered with mosses of different varieties of greenery , are surrounded by a track, positioned at the upper end, on which a small train runs