The Universe of Discourse

Thu, 11 Jul 2013

This is a public service announcement.

This is not a picture of a cobbled street:

Rather, these stones are "Belgian block", also called setts.

I took these pictures in front of the library of the American Philosophical Society on South 5th Street in Philadelphia. South 5th Street is paved with Belgian block, and the lane beside the APS is cobbled. You can just barely distinguish them in this satellite photograph.

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