Holy Trinity (16th Century) by Jan Cornelisz Vermeyen - Public Domain Catholic Painting

The Christian doctrine of the Trinity defines one God existing in three coequal, coeternal, consubstantial divine persons: God the Father, God the Son, and God the Holy Spirit, three distinct persons sharing one homoousion. As the Fourth Lateran Council declared, "it is the Father who begets, the Son who is begotten, and the Holy Spirit who brings about." In this context, the three persons define who God is, while the one essence defines what God is. Source

Jan Cornelisz Vermeyen was a Dutch, Northern Renaissance Painter. He was born in AD 1500 and died in AD 1559.