By 1656, the pendulum was incorporated into clocks, which lead to better paced and more accurate clocks. Although fairly accurate, clocks accuracy was dramatically improved by the introduction of the pendulum. Galileo had the idea to use a swinging bob to propel the motion of a time telling device earlier in the 17th century. Although Galileo Galilei, sometimes credited with inventing the pendulum, studied its motion as early as 1582, Galileo's design for a clock was not built before his death.