i'm no expert on how brick pillars are built in real life, but I'd think they're concrete/filler in the middle and brick on the exterior. So having it worn down and destroyed with bricks encased in concrete looks a bit odd.
perhaps it looks a little odd because there is very little shadow or AO or grunge between the brick arch and the door itself and it also looks like the door could never open outwards as it would hit the large bricks? also...no handles?