I decided to write my research paragraph on a popular machine known as a clock. Galileo was the one who discovered the concept of the pendulum and it was Christiaan Huygens (a Dutch mathematician, astronomer, physicist, and horologist) who invented the pendulum clock which can control the motion of a pendulum. The first pendulum clock ever created was by Salomon Coster (a Dutch clockmaker of the Hague). This brilliant invention was invented in 1656 and created in 1657 in The Hague, Netherlands. The pendulum clock increased the accuracy of time and was the world’s most precise timekeeper up until the 1940s.