In the times from the time of the Crusades, Norman and the 13th -14th Century. A reliquary in the form of a cross that had wax imbedded in the cavity of the cross was made.
The reliquary cross can hold your own personal relic that is memorable to you. Some people have suggested dirt from the first tourney site. My own has a rock from the first Outlandish Tourney site!
So think, what would your own personal relic be? Would it be small enough to fit into this reliquary cross?