John Slezer
Dutch-born military engineer and artist / From Wikipedia, the free encyclopedia
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John Abraham Slezer (before 1650 ā 1717) was a Dutch-born military engineer and artist.
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/8/84/Title_page_of_the_Theatrum_Scotiae.jpg/640px-Title_page_of_the_Theatrum_Scotiae.jpg)