The plant cathedral was built according to the twine ancient art that uses flexible wood, stakes, nails and ropes and respects the natural and econatural cycle of birth, bloom and decay. The Cathedral is the symbol of the Monte Arera project, desired by the Park of Orobie Bergamasche and by the Municipalities of Oltre il colle, Roncobello and Ardesio. Its aim is to enhance the vastity and the uniqueness of the plants that grow in the Park and on the Orobie Bergamasche crests.