The
PERFECT CASTLE
by Epic History TV and History Rebuilt
Working in collaboration with Epic History TV 
and with additional support from Paradox Studios with their 2020 release of Crusader Kings III
HistoryRebuilt has built and animated an online video for Epic History TV on How to Build the Perfect Castle
Illustrating the design evolution of a generic castle from the 11th to the 14th Century.
Here below are a few screen shots taken from the movie sequence.
click to view
