Clocks

Clocks

Late-13th century

While water clocks and, even earlier, sundials had been in use for centuries, it wasn’t until the end of the 13th century that weight-powered mechanical clocks began to appear. Who exactly invented the first mechanical clock is lost in time — excuse the pun — but records show that complex escapements and mechanical clocks were becoming commonplace in church towers by the close of the 14th century in Europe.

Since then, the accuracy of mechanical clocks has been consistently improved, doubling in accuracy about every 30 or so years on average.