All Centurions, Primus Pilus, Greetings
I thought you might appreciate this interesting mosaic. I have placed it on the Order's Seminary page as it conveys a sense of the disciples learning at the Master's feet. I recall reading that some re-fabrication in later centuries caused two of the disciples to be taken out. Note the four gospel symbols above, the Dove below.
Apsidial Mosaic of S. Pudenziana, Rome, Fourth Century