I believe the meridian line in a church was a plot point in 'The Da Vinci Code' so I'm surprised they are not more common knowledge. Yep, described here: https:

I believe the meridian line in a church was a plot point in 'The Da Vinci Code' so I'm surprised they are not more common knowledge. Yep, described here: https://en.wikipedia.org/wiki/Rose_Line https://en.wikipedia.org/wiki/Rose_Line Well, the actual meridian line refernced is this: https://en.wikipedia.org/wiki/Gnomon_of_Saint-Sulpice https://en.wikipedia.org/wiki/Gnomon_of_Saint-Sulpice