It is an example of sophisticated mosaic art commonly found in Byzantine structures.
Explanation:
The Byzantines had the mosaics as one of the most popular forms of Art, they used them to depict religious subjects inside churches for example.
The Mosaics were the most common form of art in the Byzantine Empire and they remained until the end of the Empire at the 15th century. Some of the most famous mosaics are still well-preserved to this day. The Byzantines mosaics also influenced the Muslim Art.
The nations had different systems of government and different economic systems. The USSR hated the U.S and it's capitalism, hoping to one day crush it but with the fall of the USSR in 1991, It was a monumental victory for capitalism over communism and socialism.