Also some special maps were printed on silk as "souvenirs" of major agreements following the delineation of boundaries
I've seen one of a few square miles of the Argentinean-Chile Boundary dating from the late '60's where they had to redefine the border in a valley up in the Andes. There were apparently the Treaty Copies on paper all with signatures and Seals, and then a small number of silk copies as well handed out to the Good & the Great involved.
As opposed to the usual weasel words along the bottom of 99.99% of maps this is the only map I've ever seen that WAS " an Authority on political boundaries".. .