We know less about Ancient Roman music than we o about the music of ancient Greece. There is a number of at least partially extant sources on the music of the Greeks. For example, much is known about the theories of Pythagoras and Aristoxenus (some of it from Greek sources and some through the writings of later Roman authors), and there exist about 40 deciphered examples of Greek musical notation. Very little survives about the music of the Romans. There are various reasons for this, one of which is that early fathers of the Christian church were aghast at the music of theatre, festivals, and pagan religion and suppressed it once Christianity became the official religion of the Roman empire.