Timeline

Heritage classified

Key figures

Origin and history

The Old Bridge of Millau, originally built in the 11th century, was a major building crossing the Tarn, with seventeen arches and three fortified towers. He played a key role in the exchanges between Languedoc and the Massif Central, as evidenced by a 1156 charter exempting Sylvanes Abbey from toll charges. The bridge, which was damaged several times by floods (including in 1351 and 1393), was repaired at regular intervals, with reports of work in 1412, 1437 and 1476.

An investigation of 1532 revealed its degraded state: two towers were uninhabitable, and arches threatened to collapse. Despite repairs, a devastating flood in 1758 almost completely destroyed the structure, leaving only two arches and the remains of the Moulin du Roi, built on the second pile. This mill, mentioned from the twelfth century, includes a medieval base and floors added later. The bridge, classified as a historic monument in 1934, is now a partial witness to its strategic past.

Archaeological excavations in 2012, following a flood damaging triangular avant-bec, confirmed that only 19th and 20th century developments remained on the apron. The bridge was replaced in the 18th century by the adjacent Lerouge Bridge, but its ruins, protected, recall its historical importance as a point of passage and control between the southern regions. Its architecture blends cutstone, tuf and sandstone, with characteristic triangular foreclosures.

The Old Bridge illustrates the evolution of medieval construction techniques and their adaptation to natural constraints, such as frequent floods of the Tarn. Its gradual decline, marked by partial collapses and successive repairs, also reflects the logistical and economic challenges of its maintenance throughout the centuries. Today, its remains offer a tangible overview of engineering and commercial life in the Middle Ages in the Rouergue.

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