A strange question I've wondered: given the rapid cultural evolution during the GPC, should constant major construction projects dominate most urban areas in Arthur's realm throughout the campaign? Given the amount of time it took historically to construct great castles, fortifications, and cathedrals, it seems that Arthur's realm would be in perpetual construction/reconstruction as one style rapidly gave way to the next.
I know I'm over-thinking this, but it's an idea I've returned to again and again as I try to think through the implications to how Logres would actually function (I suspect I like my campaigns a bit more 'grounded' than many, and therefore tend to struggle with issues that others easily handwave....).