I've always been interested in finding a good set of resources for "the best real-world" type maps. I am sure the Smithsonian has plenty, though it's hard to find them; I like Schiaparelli's mapping of Mars from 1877 https://www.google.com/search?q=schi...w=1536&bih=750 , I notice one recent finished-map thread says it's "loyal imitation of the style of the 1922 type topographical map of France" https://cartographersguild.com/showthread.php?t=47210 , etc.. Not sure if there's a good collection of similar such links here at the Guild.