22 JARDUERA By Hegoa Izarzugaza 3500 BCE OBELISK 2000 BCE WATER CLOCK 1500 BCE SUNDIAL 800 CANDLE CLOCK 1000 MECHANICAL CLOCK 1100 SUNGLAS 1494 HARRISON TIMPLELE 1700 PENDULUM CLOCK 1900 DIGITAL CLOCK 2000 ATOMIC CLOCK