Huygens invents the pendulum clock, utilizing the isochronous properties of pendulums to create a significantly more accurate timekeeping device compared to existing mechanical clocks.

The first pendulum clocks, based on Huygens' design, are constructed. Their enhanced accuracy leads to rapid adoption in scientific experiments, navigation, and other fields requiring precise time measurement.

Huygens publishes 'Horologium', describing the pendulum clock in detail and explaining its underlying principles. This work disseminates his invention and facilitates its widespread replication.

Huygens and other clockmakers continue to refine the pendulum clock, developing variations such as the cycloidal pendulum (to improve isochronism) and incorporating temperature compensation mechanisms. These improvements further enhance the clock's accuracy and reliability.

The pendulum clock revolutionizes timekeeping, enabling more precise astronomical observations, improving navigation at sea, and facilitating the development of accurate scientific instruments. It becomes the standard for accurate timekeeping for centuries.