Advent Plaza/Yahar'gul Chapel is much closer to Old Yharnam. After all you fight the Darkbeast Paarl in Old Yharnam, but get to the fight through the dungeons/prison in Yahar'gul.
sorry for the lazy photoshop but it will help illustrate what I mean.
Still very cool, keep up the good work. I would love to see a revised version that fixes any inaccuracy.