The Chaumont Viaduct is a railway bridge that crosses the Suize River in the town of Chaumont in France. It is a three-story arch bridge where the train runs on the top and pedestrian traffic passes on the first level. The bridge is part of the railway line between Paris and Basel and is still used today. The construction of the bridge started in 1855 and the bridge opened in 1856. There were 2,500 workers who built the bridge, day and night. The bridge was designed by the French engineer Eugene Decomble. The Chaumont Viaduct is 654 meters long and has 50 arches. The construction has over 60,000 m³ of masonry stone.