Prague is packed with magnificent architecture. Although this is a nice building it pales in comparison with the best. The lowest half of the picture is distracting, I think that cropping it off might help.
A tighter crop on the sign and the interesting building across the street would have made this a great photo. The side street pulls the viewer's eye away from the main subject and makes the picture seem busy.
Even though your buildings have converging lines this photo is still well composed... surprising - the Sign helps provide a good POI and draw attention from the buildings. Good job. (7)