Strongholds of the World I: The Stronghold of Namhansanseong in the Korea by Dr Doo-Won Cho, Seoul.

https://www.youtube.com/watch?v=9G4PvJ94rwA&t=1s

The webinar series Stronholds of the World will present non-European fortresses and fortified towns from around the world. This series is a cooperation between Aarhus University research programme "Materials, Culture and Heritage" and the Marburg Working Group for European Castle Research. Namhansanseong is a fortified town built since the 12th century on several hills close to Seoul that has been used as a stronghold until the 20th century. About 30 min presentation is followed by a discussion.