128 spaced inwardly from the side edge 126 of facing member 102 the projections 128 extend rearwardly from the facing member 102 and terminate in hooked ends 130 for passage through openings 108 for holding the sides of the facing member 102 in position the facing member 102 also includes rearwardly extending elements 114 and 118 spaced from the edges 112 and 116 respectively as seen in fig1 and 15 the projection 114 engages below the top member 40 39 and the projection 118 engages above the bottom member 48 39 as seen particularly in fig1 at two places along the surface 114 are as shown in fig1 and 16 projections 120 terminating in hooked ends 122 the projections 120 extend until the hooked end 122 pass through the opening 110 in the wall 104 so that the hooked ends snap behind edge 124 of the openings 110 by the four snap connections of the hooked ends 122 130 within openings 108 110 in the wall 104 the front facing member is securely mounted on the wall block 100 with this embodiment it is not intended that once the front facing member 102 is secured to the wall block 100 it be removed however it is within the scope of the present invention that the front facing members may be removably secured to the wall block in any conventional manner not shown so that if it is desired to change the color and or appearance of a front face on a wall block 100 the front facing member may be removed and replaced by another element the foregoing description should be considered as illustrative only of the principles.