I am generally highly skeptical of "historic" designations on buildings or other public features. Ultimately they're just used to ossify things and act as an excuse to refuse change.<p>History is certainly valuable, and I do think we should try to preserve truly outstanding examples of history, but this sort of determination too subjective, and often the balance swings too far into a realm of preserving things of dubious value.<p>One way I look at it: in the longest of long terms, every single building will have had something significant enough about it to earn it a "historic" designation, and then you can't change anything, ever.