The remains of one of the five bastions of the Citadel of Pamplona are the main feature of this room. Both the exterior wall and the interior buttresses of the bastion create unique areas for holding exhibitions and presentations. The conservation and integration of this 16th-century wall into the congress centre make it a unique area. With a surface area of 1,800 m2, the Sala de la Muralla has a height of 6.35 m and electrical/voice/data connections.