Oud Poelgeest is a castle in Oegstgeest, north of Leiden, that was the former home of the Dutch scientist Herman Boerhaave. He was a Dutch humanist and physician of European fame.
Wikipedia https://en.wikipedia.org/wiki/Oud_Poelgeest
Official Website https://www.kasteeloudpoelgeest.com/
Address 1 Poelgeesterweg, Oegstgeest 2341NM, Netherlands
Coordinates 52°10'46.629" N 4°29'5.456" E