The upper roundel depicts an Anchor Cross, symbolic of Jesus Christ, our sure anchor, and a lily which represents purity. The Anchor Cross is a very old symbol used by the early Christians as a sign of their faith at a time in which it was dangerous to be known as a Christian.

We have this hope, a sure and steadfast anchor of the soul.

Hebrews 6:19

The Anchor Cross is also sometimes represents the early pope, St. Clement, who was martyred for his ministry by being tied to an anchor and cast into the sea.

By one account, St. Clement was banished to the Crimea where he performs the miracle of slaking the thirst of two thousand Christian confessors. Because of this many people are converted and seventy-five churches are built. As a consequence, Clement is thrown into the sea with an iron anchor. But the tide every year recedes two miles, revealing a Divinely built shrine which contains the martyr's bones.

In the lower roundel is depicted a Budded Cross, with trefoil ends. The trefoil is symbolic of the Trinity, the Father, the Son and the Holy Spirit. The roses decorating this cross are emblematic of the glory of the resurrection.

Surrounding the roundels are vines and passion flowers. The ten petals of the passion flower are said to represent the ten apostles who did not betray the Lord. The three styles are said to represent the nails of the Passion, and the leaves, to be shaped like spears.

In the lower panel we see several allusions to the Trinity, notably in the fleur-de-lys and the red and blue roundels.