The house

I love Stranger Things. I mean, I always let it just play every night to get me to sleep basically. Don't get me wrong, I've seen it almost 400 times now, each season. Wide awake. If you count the times I've heard it while my eyes were closed, it'll be more than 800 times.

But I just realised a detail in the show and I'm so stupid that I didn't notice it before when Nancy Wheeler recognized the stained glass door with the rose thing then she assembled the parts that Max drew..

My question is, was there a moment she knew it from her research or from Victor Creel himself?