Abraham Ortelius (April 2, 1527 – June 28, 1598) is generally recognised as the creator of the first modern atlas. His atlas, Theatrum Orbis Terrarum (Theatre of the World), was first issued in 1570, and expanded over subsequent re-issues. An extract from his 1584 edition clearly shows Dublyn (Dublin), and below it, Carig Brenna, between Mergon (Merrion) and Brey (Bray). Most of the locations named are the locations of major monastries such as Glendalough, Maynooth, Clane, Lucan and others, and clearly indicates that Carig Brenna is an important site at the time. Note that many early maps of Ireland are printed with west at the top of the page, so you must turn it through 90 degrees to relate it to a modern map
From a technical point of view, this map is printed from a copperplate etching, which involves scratching the map details on copper using a sharp stylus. The map would have to be entirely engraved backwards, so that the printed image would be correct. The map was drawn in 1573, and 6375 copies were printed in the years 1573-1612.
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