Wide Angle Wednesday:Foucault's Pendulum

We are about to leave for the airport to begin the long journey home.
Throwing this up in a hurry.
It is in the Pantheon. Most people think it is just a clock till they read the details which I have posted as an extra.
It is evidence of the earth's rotation.

PS. I have just realised the theme is "earth, wind or fire".
Earth's rotation. Touché :-)