I’m not sure who’s responsible for this, but there was a recent (as far as I can tell) update to the IMDB pages of several Sierra games. Looking at the Trivia section of “The Colonel’s Bequest” I found this:
“Game designer Roberta Williams visited New Orleans to bring atmosphere and historical authenticity to the game. She pored over floor plans of antebellum mansions, looked up ghost stories related to the bayou country and visited museums and plantation houses.”
Hmmm. I wonder how much of the real world found its way to the game?