Maps are metaphors.
In A Series Of Maps
Of The World As Known At Different Periods;
Constructed Upon An Uniform Scale, And
Coloured According To The Political Changes Of Each Period
The Empire of Cyrus the Great
At the time of the Death of Constantine.
The Empire of Kublai Khan
I love the David Rumsey Map Collection – this find is via a tweet from @bibliodyssey. Any map series that references the Massegetae and Sogdiana is a good one.