Pliny was a governor of a Roman province at the beginning of the Second Century. He was monitoring those who identified themselves as Christians in order to make report to the Emperor Trajan. He wrote the following to Trajan around 100 AD.
They also declared that the totality of their guilt or error amounted to no more than this: they had met regularly before dawn on a certain day to chant verses antiphonally amongst themselves in honor of Christ as if to a god, and also to bind themselves with an oath, not in a criminal conspiracy, but to abstain from fraud, banditry, and adulteration, to commit no breach of trust, and not to renege on a deposit. After completing this foolishness, it was their custom to disperse and reassemble later to take food of an common and innocuous type; but they had in fact given up this practice since my edict, issued on your instructions, which banned all associations.
Interesting description, don't you think?