Historic architecture can be an extremely enjoyable subject for photography but it should be placed in context. If you had backed up just a little and widened the angle from the building, to show off that terrific exterior wall surfacing as well as the window, plus adjusted the depth of field to something like f8 or higher (assuming your camera will let you do that--many digital cameras won't), this would likely have a rating of 75 or better (actually, since most caedes members don't know what they're voting on when they're in the voting booth, which consequently results in puzzling tallys at best, you should ignore the c-index rating and concentrate on what members are saying in the comments; some of them may actually be professional photographers with years of experience to share, and happy to do so). The window would have been the focal point, the historic construction would place it in the timeframe of local history, and all the features of the window would have been in focus rather than just the left end. You have a good eye for detail and photographic significance. Take this friendly criticism from an old fart who means well; keep at it--you're on the right track.
Beth