Visited by Gottfried Leibniz

November 18, 1676

On his way back to Germany from England, Leibniz spent a few days in the Dutch Republic, where he met both Leeuwenhoek in Delft and Spinoza in nearby Voorburg, a village between Delft and Den Haag.

Leeuwenhoek may well have showed Leibniz the little animals in some of the infusions about which he had written to the Royal Society six weeks earlier, in October.