Why do Priests put a piece of Hostia in the Chalice?

Why do Priests put a piece of Hostia in the Chalice?

The symbolism of this act reminds us of the unity of the Church and the spiritual connection between each celebration.

It comes from the primitive church and a custom intended to mean unity with the Pope and the local bishop.

The symbolism of this act also points to the unity of the Body and Blood of Jesus in the Hostia.

Because both the Host and the Consecrated Wine contain the whole presence of Jesus: Body, Blood, Soul and Divinity.

It's a reminder that every priest's action at Mass has its roots in nearly 2,000 years of history and tradition.