Frequent Fires
Fires happened all the time in the kitchen. For some wild reason, mostly wooden tools didn't always mix well with large fires, who knew! For years this was just part of the job until finally, kitchens started shifting their designs to being made of stone. Ah yes, that makes more sense...
Spiral Stairs
Back in the day, every spiral staircase in a castle, of which there were many, was clockwise. This was done for a specific reason: with clockwise stairs, right-handed intruders would have a harder time swinging their swords at the castle guards. Everything had some thought...