A small plate where the priest places the Bread (the Host) during the Holy Mass. The paten is put at the top of the chalice and purificator before and after the Holy mass. There's a large paten that is often used during the Holy Communion to avoid the Holy Eucharist from falling to the ground
A large gold/silver container where many Hosts for the faithful are placed. The Ciborium is placed inside the tabernacle after the mass if there are remaining hosts inside