Irlandiae regnum, Jodocus Hondius - Gerhard Mercator 1512-1594

Together these two atlas sheets comprise Gerard Mercator's map of Ireland. They were published in either the 1628 or 1633 French editions of Mercator and Jodocus Hondius's "Atlas". Originally published in 1595, this book of maps was the first such publication to use the term "atlas" for its title. As a cartographic triumph, the atlas was translated into the major European languages (Latin, French, German, and English) and was reprinted dozens of times up to the mid-17th century.
Courtesy of Boston Public Library