Classic-Castle.com

River warfare ships such as "Tower Ships" and paddlewheel technology.
http://youtube.com/watch?v=1tjSiB1pbUw

Ocean going ships and shipbuilding designs such as "Treasure ships " with bulkhead.
http://youtube.com/watch?v=e6BUZJHfBHM

I always keep an eye on what the History channel is playing as it could be something usefull like this. Thanks JP for finding this and sharing.
-Tower

Wow. That is amazing. The variety of ships is just amazing. I wonder how many of those castle fortresses were ever made. It seems like it would be a massive undertaking.

Thanks for posting it.

R