What Fortress used as a palace and prison has the Festning tunnel running underneath it?
Akershus Fortress Akershus Fortress (Norwegian: "Akershus Festning" ) or Akershus Castle (Norwegian: "Akershus slott" ) is a medieval castle that was built to protect Oslo, the capital of Norway. It has also been used as a palace and as a prison.
Wressle Castle Wressle Castle is a ruined palace-fortress in the East Riding of Yorkshire, England, built for Thomas Percy in the 1390s. It is privately owned and not open to the public. Wressle Castle originally consisted of four ranges built around a central courtyard; there was a tower at each corner, and the structure was entered through a gatehouse in the east wall, facing the village.