What is academic thought on the "fool’s cap map of the world?" Is circa 1590 an accepted estimate? I ask because it is captivating, infrequently mentioned online, and is used as evidence by many "crank" communities.

by [deleted]

Here it is.

I can't link directly to the entry, but here's an Oxford library's digital collection, and you can search for the piece by name.

shalafi71

Hope you get an answer. Can I ask what you mean by cranks using it as evidence?