Medieval floor tile from Tintern Abbey. yes this is a real old piece of tile. i think you artsy ones out there could copy this exactly, or make up your own, stencil might help. but its mostly about the patina. get that down and your set.
Heraldic tiled floor at Cleeve Abbey, UK, 13th century.
Because you will walk on original sidewalk pavers designed by Antonio Gaudi. You must remember to look down as well as up.