The Trinity …
The Trinity has existed in ancient cultures before the rise of Christianity.
For example there is The Winged Disc Of Ra;
The symbol, which appears on this site, placed over the pylons or gates of many Egyptian palaces and temples, is emblematic of the three persons of the Egyptian Trinity. The wings, the serpents and the solar disc are the insignia of Ammon, Ra and Osiris. There is also the Egyptian Trinity that is portrayed as Osiris the father, Isis the mother, and Horus the Son/Sun.
Grand Temple of Horus Behdety 