Within Catholicism and some other Christian churches, the tabernacle is a box- like vessel where reserved consecrated hosts (Eucharist) are kept. The term "tabernacle" arose for this item as a reference to the Old Testament tabernacle which was the locus of God's presence among the Jewish people - hence, it was formerly required (and is still generally customary) that the tabernacle be covered with a tent-like veil or curtains across its door when the Eucharist is present within."7
In Christianity, Jesus is known as the High priest because He offered Himself as the sacrifice for the atonement of our sins, and continues to be offered at every mass during the consecration of bread and wine.
The Hebrew priests are the ones who offer the sacrifice. In the Roman Catholic Church, only the priest can perform the consecration of the bread and wine to be transformed to the body and blood of Christ.God’s priests Likewise we are to serve as God’s priests.