Relief

This decorative tile is decorated with the Chi Rho emblem set under an arch, and a commemorative inscription down each side. The monogram is formed by the Greek letters chi and rho (X and P), the first two letters of the Greek name of Christ. The symbol itself predates Christian usage. It was used as an abbreviation of chrestos meaning auspicious and was a symbol of good omen. The Emperor Constantine the Great used the emblem on his standard, though it is not clear whether it was used for its Christian connotations on that occasion. On the present relief, displayed in conjunction with the Greek letters Alpha and Omega the emblem is an emphatic expression of Christianity.

Flat areas at the top and bottom of the face of the plaque suggest that it slotted into some sort of frame and possibly formed part of a decorative frieze.