The Centennia Atlas
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The Centennia Historical Atlas software runs under Apple Macintosh OSX (Intel Macs running Leopard, Snow Leopard, etc.), as well as Microsoft Windows (Windows 8, 7, Vista, etc.). The software requires 20 megabytes of hard disk space and 40 megabytes of memory. Centennia does not have any other significant system requirements, and it will run well on almost any computer made in the year 2003 or later.
The files available for download here include all text and map data covering ten centuries of European and Mid East history. The French Revolutionary and Napoleonic Period (1789-1819) is available at no cost. To access the full time period, you will need to purchase an access code.
Note (September 19, 2013): Some downloads are temporarily hosted at ReedNavigation.com to balance bandwidth. ReedNavigation.com is also owned by Centennia Software. Just click on either of the download links below, and your file will download from our alternate site automatically.