Some of the earliest christian art that we know about has been found where? all of the above the catacombs of rome the roman basilica the temple of athena

The early Christian art is also called Paleochristian art. It is the art produced by Christians or under Christian patronage from the earliest period of Christianity .
The early Christian art used artistic media including  fresco, mosaics, sculpture, and manuscript illumination. It not only used Roman forms, it also used Roman styles.
Some of the earliest Christian art that we know about has been found in the underground burial places under Rome - the ancient catacombs of Rome. They are extremely important for the art history of Early Christian art.