The grandfather clock is used for misure the time, with the pendulum moviment.
It 's very esthetic and artistic for your living space.
Have various size; similar a desk clock, a clock- room or the large tower.
It was invent by Galileo Galilei.
If you think to a grandfather clock... Think to a wooden object, old and...used probably by your Grandfather!
But, here are some images, that do not aspect.