This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Galileo pendulum clock . pendulum clock designed by Galileo Galilei around drawn by Vincenzo Viviani in Part of the front supporting plate is removed by the artist to show the wheelwork Probably the first design for pendulum clock although it didn't have face It was partly constructed by Galileo's son who died before he could finish