Vine staff

The epitaph of M. Caelius, chief centurion (primus pilus) of the ill-fated 18th Legion. His vine staff breaks the frame and even runs across the inscription.

The vine staff, vine-staff, or centurion's staff[1] (Latin: vitis)[2] was a vinewood rod of about 3 feet (1 m) in length used in the ancient Roman army[3][4] and navy.[5] It was the mark and tool of the centurion:[6] both as an implement in the direction of drill and maneuvers[citation needed]; and to beat wayward or laggard soldiers or sailors under his command.[7] It was also borne by evocati who held an equivalent rank.[8]