Oppidum d'Altimurium, Ancient archaeological site in Murviel-lès-Montpellier, France.

The Oppidum d'Altimurium covers about 20 hectares on a slope overlooking the Montpellier garrigue at 190 m altitude, near Murviel-lès-Montpellier. Its upper town, the Castellas d'Hautemur, held the Roman castrum, while the lower town on the slopes contained a monumental centre with a 75 m square, two large porches and a Corinthian-order building probably a temple. Excavated stone walls, a curving flight of shallow steps and tumbled rubble are visible.

The site was occupied from the 2nd century BCE and has Gaulish origins. In the 1st century BCE a cyclopean wall nearly 2 km long enclosed the town, which depended on Nemausus (Nîmes). A monumental centre was built in stages between the 2nd century BCE and the 2nd century CE and abandoned in the 3rd century. Charles Martel destroyed the town in 737 and it never recovered.

The name Altimurium is recorded for this hill-town above Murviel-lès-Montpellier; the upper part is still called the Castellas d'Hautemur. Finds from the excavations, such as mosaics and statues, are kept in the archaeological museum in the village below, which explains what the exposed walls belonged to.

The site is accessible but requires sturdy footwear due to uneven terrain and sloping paths. A local museum displays artifacts from excavations and helps visitors interpret what they see among the exposed ruins.

The lower town's monumental area held a square 75 m long, with rooms built against the hillside, two large porches flanking the square and a Corinthian-order building probably a temple. It was built in stages between the 2nd century BCE and the 2nd century CE, then abandoned in the 3rd century.