A book of bridges

by Walter Shaw Sparrow

THE PONTE NOMENTANO, A MEDIÆVAL WAR-BRIDGE IN THE CAMPAGNA, THREE MILES FROM ROME. IT SPANS THE WILLOW-FRINGED ANIO, A SACRED RIVER IN ITALIAN LEGEND

The Pont Saint-Esprit was commissioned by the Abbey of Cluny, and in 1265 the Pontist Brothers began to found the piers, after discussing their plans with Jean de Tessanges, Abbot of Cluny. Now, an earlier work of the Pontist Brothers, the Pont Saint-Bénézet at Avignon, was eighty years old in 1265, and his behaviour in the Rhône must have been a subject of interest to the successors of Bénézet. I conclude, then, that the Pont Saint-Esprit may be looked upon as a technical criticism of the earlier bridge, and it approves in all respects the work of St. Bénézet. Both bridges have relief arches for spate water, and when they are examined in bird’s-eye views, both have an elbow opposed to the current of the Rhône, and each suggests the image of a bridge of boats to which already I have drawn attention ([p. 262]). This image is rather more pronounced in the case of the earlier bridge, for the length of Bénézet’s piers, in the direction of the current, is enormous, being not less than thirty metres.

For the rest, the Pont Saint-Esprit seems to have an enchanted size, his most confident historians giving neither the same dimensions nor the same number of arches. Men with tape measures have grown tired of their job, seemingly; and even in photographs some arches are omitted while others are blurred by distance. On my table is an excellent photograph: it takes in just a bit of the metal arch which, about fifty years ago, displaced two of the old arches and made a passage for boats. From this point to the elbow upstream, there are eleven arches; beyond the elbow there are six more, and the bridge is not complete. This is all the camera can do. According to Viollet-le-Duc, there are twenty-two arches in a length of about 1000 metres; the roadway is five metres wide. Larousse tells me, on the other hand, that the length is 738 metres, the width 5 metres 40, the number of arches twenty-six; and another great work of reference, published also by Larousse, gives 919 metres for the length, and says that among the twenty-five arches there are nineteen ancient ones. We ought to admire the variegated self-confidence of historians.

But the main point is evident enough: the Pont Saint-Esprit is one of the longest stone bridges in the world. And the construction is truly marvellous. This was proved when a pier was pulled up to make room for the iron arch. The labour required was astounding, so excellent was the cemented masonry. But, of course, the bridge has passed through a good many changes to keep him in touch with the increase of traffic. In the seventeenth century he was still closed at both ends by strong gateways, while on the town side was a quite important defence of the fourteenth century, afterwards embodied in the citadel by which the river was guarded above-bridge. These defensive works have all gone, but their effect can be studied in “La Topographie de la Gaule,” where an engraving gives a good idea of their appearance.

12. Ponte Nomentano in the Campagna, three miles from Rome. This, no doubt, is the most romantic of all the fortified bridges that Brangwyn has painted. Both bridge and castle are mediæval, but they rise over the willow-frilled Anio, a river haunted by myths which to the ancients were sacred truths. It was in the Anio that Rhea Silvia passed from the brief hours of her mortality into the life of a goddess; and to this river Silvia confided her two children, Romulus and Remus, the twin Moses of Roman story, who were carried in their cradle to the Tiber, where other waters bore them on and on till at last they came to land under the fig tree at the foot of the Palatine hill. What a delightful legend to be whispered by the current of the prattling Anio below the uncouth stones of the Nomentano! What other war-bridge has been united to such a gracious myth?

And history as well as legend has been busy on the banks of the Anio. Into this river the ashes of Marius were thrown by the adherents of Sulla; and beyond the bridge, on the right bank, west of the Via Nomentana, is a very famous hillside, the Mons Sacer, to which the plebeians retreated, as to a fortified place, when they asserted their right to tame the patricians. Their first great strike, or secession, occupied four months in the year 549 B.C., when four thousand of them encamped on the friendly hill, leaving the crops unharvested, and the city without a garrison. Mount Sacer became sacred to the People of Rome, and to the historic sense it is the Hill of Liberty, sanctified by the first brave ideals of a democratic justice. Yet in recent times vulgarians have taken hold of Mount Sacer, and have carted it away by the ton to be used as building material.

As for the Ponte Nomentano, he is nothing more than a burly soldier, a common man-at-arms. The mediæval engineer was uninspired by an enchanted site, and gave the whole of his attention to the pronged battlements. He had no feeling for proportion, and no liking for a stern eloquence of line such as we find in the noble castle of Chenonceaux, a masterpiece of the French Renaissance, whose long wing is carried by a bridge of five round arches, and whose turreted portion is pierced by a single arcade.

13. The bridges of Laroque, near Cahors, on the river Lot. In this rapid sketch Brangwyn represents a riverside Gibraltar upon which an ancient village stands, partly on bridges. Its value in “the good old times” as a stronghold fortified by Nature is patent, and the watch-towers have an unsleeping alertness that looks out upon the world through one eye or window. I should like to know who built the first bridge at Laroque. There is a Romanesque form in the arch drawn by Brangwyn, and the Romans were active in the neighbourhood. Over the Lot at Divona, now called Cahors, they built a bridge, which perished some years ago in a local storm of party feeling. To imagine Rome with a Gibraltar on the Lot is a great pleasure.