👉 Presbyterium, also known as "the threefold nature of Christ," is a Christian concept that refers to the three persons of the Trinity. It was first introduced by Saint Ambrose in his work on theology called "De Trinitate." The three persons are the Father, Son, and Holy Spirit. The Father is the source of all life and creation, while the Son is the ultimate reality and personification of the Father's love, mercy, and power. The Holy Spirit is