The Copernican Revolution from the Inside(lesserwrong.com)
lesserwrong.com
The Copernican Revolution from the Inside
https://www.lesserwrong.com/posts/JAAHjm4iZ2j5Exfo2/the-copernican-revolution-from-the-inside
https://www.lesserwrong.com/posts/JAAHjm4iZ2j5Exfo2/the-copernican-revolution-from-the-inside
If the saying was from the 11th century (or even prior to the 15th century) and refers to the Earth, that would be interesting. I realize the heliocentric model existed long before Copernicus, but an early date to the motto would add more weight to arguments correcting misperceptions of the Copernican affair.
EDIT: Looks like it may have been adopted around 1600, when it first appeared on the Carthusian shield: https://books.google.com/books?id=gZaeGVNjIfcC&lpg=PA471&dq=...