charles barrow's writing

I'll always take a moment to stop and read a blue plaque, when I see one affixed to a house or building, to see who is being honoured, or remembered. Who once lived, or stayed, visited briefly, or otherwise bestowed their glorious presence upon said house or building. By definition, the plaques memorialise eminent people; the great and the good (but hopefully the slightly shady too), otherwise, what's the point? Who would care about a plaque dedicated to someone who achieved nothing of note? Maybe their close family would care, but the rest of us? Probably not. And what I would be curious to know is the minimum amount of time an eminent personage needs to remain in a building before that building can claim bragging rights and raise a plaque dedicated to that personage. The case of Charles Dickens is the reason I ask this question. I have spent years, all my adult life, living in various towns along the south coast of England, and almost all of them have had a blue plaque dedica