The rotunda of the Griffith Observatory has murals painted by Hugo Ballin.  He worked for more than two years to depict the scientific progress of man.  Also, the dome itself is a mural showing a mixture of science and mythology, with the Zodiac at the center.  And all of that is above the Foucault Pendulum which has been demonstrating the rotation of the Earth to visitors since the Observatory first opened in 1935.