The Sacrifice of Melchizedech

Painted wood relief
Church of St. Peter, Sarleinsbach, Germany

The episode shown is in Genesis 14:18-20. Melchizedech's sacrifice of bread and wine is a type of the sacrifice of Christ in the Letter to the Hebrews (5:5-7), and of the Eucharist in subsequent theology. Here as in later medieval images of the episode, Abraham is dressed as a warrior and kneels before the bread and wine while his army looks on. As is usual in earlier medieval images, the altar is a low stone affair rather than a proper medieval altar with a linen cover (as for example in Tiepolo's version). The crowned figure in the left background is the King of Sodom, who also greeted Abraham upon the return from his victory.

Read more about images of Melchizedech
Read more about images of Abraham.

Source: Wolfgang Sauber via this page at Wikimedia Commons.