The buildings on the left are much more prominent than those on the right. This always arises when a street is curved, and is one of the most compelling reasons to shape streets with curves. The eye tracks on the exposed buildings from some distance and tends to linger on them as the perspective changes. The buildings on the right see comparatively little exposure, and, in this case, are lower buildings.
Notice that one of the doors of the cathedral faces straight down the street. Notice also that the bricked-up window in the foreground drains life out of the street.
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