Keystone, probably depicting "Columbia," or "Aphrodite" who is usually associated with the myrtle leaf wreath

Glazed terra cotta keystone from the Riverside theater, West 96th Street, Broadway.

Below is a photo of me from 1978, the keystone can partially be seen in the lower right corner with the red arrow. A large newel post from the Riviera theater's Japanese rooftop garden can be seen by the blue arrow.

Photo from 1914, taken when the Riviera was just 3 years old