Pendulum pioneers
In 1657, the 10-year-old Dutch orphan Christiaan Reijnaert was apprenticed to clockmaker Salomon Coster in The Hague. It was a momentous time for Coster: he is credited with building the first pendulum clock, incorporating the invention by Christian Huygens.
The earliest surviving pendulum clock dates from 1657 but it is probable that the prototype was ma…