Clausentum was a Roman port and settlement occupying a defensible peninsula in a meander of the River Itchen, on the site of modern Bitterne Manor in Southampton. Active from the mid-1st century AD through to the late 4th or early 5th century, it developed from an early roadside settlement into a fortified late Roman site, with substantial defensive walls and bastions added in the later 3rd or 4th century, possibly as part of the Saxon Shore system or related coastal defences.
Source: Pleiades — A Community-Built Gazetteer and Graph of Ancient Places. View the Pleiades record →
Clausentum was a key port at the head of Southampton Water, serving as a transshipment point linking maritime traffic with the road network running inland to Winchester (Venta Belgarum). Its late Roman refortification suggests strategic importance in defending the south coast and its harbours, though it is not listed among the canonical Saxon Shore forts in the Notitia Dignitatum.
Excavations by M. Aylwin Cotton and others in the 1930s–50s revealed sections of the defensive wall and ditch cutting across the neck of the peninsula, a bath-house, timber and stone buildings, quaysides, and substantial coin and pottery assemblages spanning the Roman period. Finds include late Roman coinage extending into the Theodosian period and evidence of imported goods consistent with an active port, though much of the site now lies beneath modern housing, limiting further investigation.
Clausentum was a Roman port and settlement occupying a defensible peninsula in a meander of the River Itchen, on the site of modern Bitterne Manor in Southampton. It is recorded in the Pleiades gazetteer of ancient places as a site site from the Roman period in Britain.
Bitterne (Clausentum) Roman station is classified as a Roman site — a civilian site in the Pleiades ancient world gazetteer. Roman Britain's archaeology encompasses thousands of sites ranging from legionary fortresses and marching camps to villas, temples and towns.
Several Roman sites lie within a short distance, including Roman piers and revetment in the River Itchen (0.4 km), Bitterne (0.8 km), Eastern aqueduct and the water catchment area of a western aqueduct, at Netley Abbey (3.9 km). Aubrey Research maps over 2,200 Roman sites across Britain, drawn from the Pleiades ancient world gazetteer.
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