All things have been degraded in our time and have also been multiplied, which is perhaps a condition of degradation; and your simple thing, your bridge, has suffered with the rest. Men have invented all manner of bridges: tubular bridges, suspension bridges, cantilever bridges, swing bridges, pontoon bridges, and the bridge called the Russian Bridge, which is intolerable; but they have not been able to do with the bridge what they have done with some other things: they have not been able to destroy it; it is still a bridge, still perilous, and still a triumph. The bridge still remains the thing which may go at any moment and yet the thing which, when it remains, remains our oldest monument. There is a bridge over the Euphrates--I forget whether it goes all the way across--which the Romans built. And the oldest thing in the way of bridges in the town of Paris, a thing three hundred years old, was the bridge that stood the late floods best. The bridge will remain a symbol in spite of the engineers. Look how differently men have treated bridges according to the passing mood of civilization. Once they thought it reasonable to tax people who crossed bridges. Now they think it unreasonable. Yet the one course was as reasonable as the other. Once they built houses on bridges, clearly perceiving that there was lack of room for houses, and that there was a housing problem, and that the bridges gave a splendid chance. Now no one dares to build a house upon a bridge, and the one proceeding is as reasonable as the other. The time has come to talk at random about bridges.