> # Etymology
> Neither part of the monument's name is correct. ... was not a "castle" in the traditional sense, but instead may have functioned more like a "prehistoric high rise apartment complex".[8]
My understanding was always that aside from vanity castles like Craigdarroch (https://thecastle.ca) there aren't castles in North America because they're only practical in a pre-cannon world
Castles became star forts, with stone/brick augmented with massive amount of earth. These were relatively effective against artillery into the 20th century.
Castles are practical against cannons but only if built with thicker walls than typical.