23 ฤดูกาล
705 ตอน
Modern Marvels - Season 6 Episode 41
The art of fortification evolved along with man’s need to defend his territory from attack. There was no other reason. From hills surrounded by branches and crude fences to intricate walled cities, to impenetrable castles – the strongholds of the past echo the history of great battles for territorial control.
- ประเทศ : United States of America
- ประเภท : Documentary
- ผู้อำนวยการ : Bruce Nash
- นักแสดง :
