Johann Weikhard von Valvasor

Johann Weikhard Freiherr von Valvasor or Johann Weichard Freiherr von Valvasor (Slovenized: Janez Vajkard Valvasor, pronounced [ˈʋáːlʋazɔɾ]) or simply Valvasor (baptised on 28 May 1641 – September or October 1693) was a natural historian and polymath from Carniola, present-day Slovenia, and a fellow of the Royal Society in London. He is known as a pioneer in the study of karst topography.

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