This is a detail of Palacio de Bellas Artes (Palace of Fine Arts) building. The building was constructed between 1904 and 1934.
The sculpture on the left side of the upper arch is dedicated to Music, it consists of a winged muse playing the violin and a man writing the notes of the music he hears. While the one on the right side is dedicated to Inspiration, is a muse with wings in a protective position whispering in the ear of another.
The main figure at the center of the building’s tympanum is Harmony, which represents the balance between positive and negative emotions.
Links of other photos of Palacio de Bellas Artes that I published in my blog: