The distorted map of Britain from the Cosmographia (lot 10) was "conceived alongside others of the whole Roman Empire by Greco-Roman astrologer, mathematician and writer Claudius Ptolemaeus. Ptolemy’s Cosmographia was a ground-breaking treaty that challenged medieval map-making and revolutionized cartography." Since maps at the time were made to reflect landmarks and powerful cities, the actual sizes were always skewed. Ptolemy actually used mathematical calculations though to try and accurately represent the land, dramatically changing future mapping. The lot contains a book that discusses the geography and one full of 27 copper-engraved maps of the known world, estimated to bring in £70,000-90,000 ($117,740-151,380).