King and Priest of Salem
Melchizedek held the combined office of king and priest of Salem, generally identified with Jerusalem. The Genesis account presents him as a 'priest of the Most High God,' and the Orthodox commemoration describes him as a Canaanite whose lineage Scripture does not record. His name is interpreted to mean 'king of righteousness,' while his city's name is associated with peace.
The offering of bread and wine and the blessing he gave Abraham, together with the tithe Abraham rendered to him, are read in the commemoration as marking his priestly authority and as prefiguring the Church's liturgical offering and the Eucharist.