The Plantagegeer, one of Delft's several smaller city parks (Source)
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Hugo Grotius, a founding father of modern international law. (Source)
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Antonie van Leeuwenhoek, the first acknowledged microscopist and microbiologist. He is commonly known as the father of microbiology. (Source)
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Martinus Beijerinck, the founding father of the Delft School of Microbiology. He is often considered as one of the founders of virology, environmental microbiology, and industrial microbiology. (Source)