From the sale listing; A GROUP OF SIX HARDING BLACK DOUBLE-SIDED ARCHITECTURAL TILES. EACH IS SIGNED AND DATED 1965. THEY ARE A BEAUTIFUL CHINESE BLUE, AND DECORATED ON BOTH SIDES FEATURING A WILD HOG, ARMADILLO, CACTUS, LONG HORN STEER, PORCUPINE AND ROAD RUNNER.

ALL TILES ARE IN EXCELLENT CONDITION.

EACH TILE MEASURES 12" SQUARE AND IS 4 3/4" THICK. EACH WEIGHS APPROXIMATELY 25 TO 30 POUNDS.

The listing (while available) is at; 6 HARDING BLACK POTTERY DOUBLE SIDED TILES SIGNED 1965

I can't help but wonder what kind of project these tiles were originally produced for.