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In page Ancient Roman architecture:

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These enabled the building of the many aqueducts throughout the Roman Empire, such as the Aqueduct of Segovia, the Pont du Gard, and the eleven aqueducts of Rome. The same concepts produced numerous bridges, some of which are still in daily use, for example, the Puente Romano at Mérida in Spain, and the Pont Julien and the bridge at Vaison-la-Romaine, both in Provence, France.[citation needed]