The Malaspina Dal Verme Castle in Bobbio is a fortified structure consisting of several buildings enclosed within the internal stone walls. Currently the castle has only the internal walls, the external one having been demolished, together with the Porta Nuova tower, in 1858, when the straight line known as Porta Nuova was opened. Consisting of a massive keep with a rectangular base to which are connected a round turret, a square one and other small buildings, the guards' lodge and a recently built one, much lower than the keep. All the buildings are made of stone with brick inserts, have small windows and are all equipped with tile roofs. There are traces of two entrances equipped with a drawbridge, in ancient times only the north-west entrance gave access to the keep. The keep has five floors with rooms with barrel ceilings and inlaid wooden floors; the first three for residential use, the fourth for housing the troops and the last for defensive maneuvers, consists of an attic supported by four pillars today illuminated by 18 recently opened windows, originally there were only splayed slits. In 1973, interventions were carried out which involved the reconstruction of all the plasters, the floors, the roof, the consolidation of the structures and part of the staircase.