This is Johnson and Ward’s 1866 map of Prussia, Germany.  Prussia attained its greatest importance in the 18th and 19th centuries when it dominated northern Germany politically, economically, and in population.   During the 19th century, Chancellor Otto von Bismarck pursued a policy of uniting the German principalities into a Lesser Germany which would exclude the Austrian Empire.  Bismarck’s North German Confederation formed in 1867, one year after this map was issued.  Subsequent Johnson atlases removed the specific Prussia map in favor of larger map incorporating then entire German Confederation.  Surrounded by the fretwork style border common to Johnson’s atlas maps issued between 1863 and 1869.  Steel plate engraving prepared by A. J. Johnson for publication as platesno. 87 in the 1866 edition of his  New Illustrated Atlas…   This is the last edition of the Johnson’s  Atlas  to bear the Johnson and Ward imprint.
<bdi><a href="https://en.wikipedia.org/wiki/en:Alvin_J._Johnson" class="extiw" title="w:en:Alvin J. Johnson"><span title="19th century United-States cartographer">Alvin Jewett Johnson</span></a>
</bdi>
1866 (dated 1865)
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