Nicolaas Hartsoeker was a Dutch mathematician and physicist who invented the screw-barrel simple microscope c. 1694.

Gouda is a city and municipality in the west of the Netherlands, between Rotterdam and Utrecht, in the province of South Holland. Gouda has a population of 75,000 and is famous for its Gouda cheese, stroopwafels, many grachten, smoking pipes, and its 15th-century city hall. Its array of historic churches and other buildings makes it a very popular day-trip destination.