On the ring is an ornament, braided from fish and bunches of grapes. These are the most ancient symbols of Jesus Christ. The word "fish" (Greek ICHTHYS) is a backnonym, that is, having a symbolic decoding. The initial letters hide it
the phrase "Jesous Christos Theou Yios Soter - Jesus Christ, the Son of God, Savior."
The vine symbolizes Jesus Christ, thanks to His own words: "I am the true vine, and My Father is the vinedresser" (John 15: 1). Therefore, on early Christian frescoes, fish and grapes, put together, symbolized the Communion.
There is another connection between the symbols of fish and grapes. According to legend, during the World Flood, God's curse did not spread to the fish, and she freely swam in the waters along with Noah's ark. And Noah, having just stepped on land, planted a vine before all other plants.
"Lord, Jesus Christ, Son of God, have mercy on me," is written inside the ring.