Shamrock as Totem ~ Sacred and Secular: What do the shamrock and the fleur-de-lis have in common? They have been used by two different European cultures as symbols of the Christian Trinity. The shamrock is to Ireland what the fleur-de-lis is to France: both nation building tool and symbol of national identity. If you did a census of cemetery emblems, would you find more three-leaf clovers or trefoil lilies? Happy St. Patrick's Day. Sacred Heart Cemetery.