Slezer was born in a German-speaking region of Europe, possibly the upper Rhineland.
[1] He arrived in the Kingdom of Scotland in 1669,[2] and was appointed Surveyor of his Majesties Stores and Magazines, which involved compiling detailed surveys of the country's fortifications.
He is best known for his Theatrum Scotiae, a series of engravings of views of castles, abbeys, towns, and seats of the nobility he encountered whilst travelling throughout Scotland in his capacity as Captain of the Artillery Company.
This never materialised, however, and increasing financial difficulties forced Slezer to spend the last years of his life in the Holyrood Abbey sanctuary to avoid debtors' prison.
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