This square breaks an important rule for public squares - it is a dead end. That can be tolerated here, since this is really a courtyard that belongs to the Guildhall.
In other respects, it fits nicely into the category of a small square - its scale and proportions are good, and it has attracted people, who have doubtless attracted the pigeons.
Think how much better these buildings would look if the black grunge were cleaned off them and the underlying light-colored stone allowed to gleam again.
Did you notice immediately that the building in the center is far from exhibiting mirror symmetry? It is well balanced, which is a perfectly reasonable, even preferable, substitute for mirror symmetry.
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