This depiction of Gaia is the third part of a three-piece frieze atop the Austrian National Library building in Vienna which is part of the Hofburg Palace.
Wikipedia's page for the Hofburg Palace (
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"The exterior decoration with Attika figures was executed by Lorenzo Mattielli in 1726. He placed a statue of Pallas Athene riding on a quadriga above the main entrance. On the left portion of the roof, he situated Atlas, supporting the celestial globe, flanked by Astronomy and Astrology, and on the opposite side, Gaia with the terrestrial globe, flanked by allegories of Geometry and Geography."
Wikipedia's page for Gaia (
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"In Greek mythology, Gaia ... was the personification of the Earth, one of the Greek primordial deities. Gaia was the great mother of all: the primal Greek Mother Goddess; creator and giver of birth to the Earth and all the Universe; the heavenly gods, the Titans, and the Giants were born to her. The gods reigning over their classical pantheon were born from her union with Uranus (the sky), while the sea-gods were born from her union with Pontus (the sea). Her equivalent in the Roman pantheon was Terra."