The Ancient Egyptians were the first to make sundials, in 2000 BC. They were inspired by the movements of shadows as the sun advanced across the sky. The earliest known of these clocks dates from the 14th century BC. The night time charts were based on water clocks. Water clocks were designed with sound-producing bells to indicate hours.
Around 1090, the Chinese astronomer Su Sung devised the first mechanized water clocks. Mechanical clocks that were not powered by water slowly started appearing in the 13th century, but they were heavy. In the 15th century, portable clocks and watches were introduced. It was Salomon Coster and Jan van Call who first produced a pendulum clock.
Picture credit: google