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Concept
Roman Baths (Bath)
Summary
The Roman Baths are well-preserved thermae in the city of Bath, Somerset, England. A temple was constructed on the site between 60 and 70 AD in the first few decades of Roman Britain. Its presence led to the development of the small Roman urban settlement known as Aquae Sulis around the site. The Roman baths—designed for public bathing—were used until the end of Roman rule in Britain in the 5th century AD. According to the Anglo-Saxon Chronicle, the original Roman baths were in ruins a century later. The area around the natural springs was redeveloped several times during the Early and Late Middle Ages.
The Roman Baths are preserved in four main features: the Sacred Spring, the Roman Temple, the Roman Bath House, and a museum which holds artefacts from Aquae Sulis. However, all buildings at street level date from the 19th century. It is a major tourist attraction in the UK, and together with the Grand Pump Room, receives more than 1.3 million visitors annually. Visitors can tour the baths and museum but cannot enter the water.
The water is sourced from rainfall on the nearby Mendip Hills, which then percolates down through limestone aquifers to a depth of between . Geothermal energy raises the water temperature here to between . Under pressure, the heated water rises along fissures and faults in the limestone, until it bubbles up from the ground into the baths. This process is similar to an enhanced geothermal system, which also makes use of the high pressures and temperatures below the earth's crust. Hot water at a temperature of rises here at the rate of every day, from a geological fault (the Pennyquick fault). In 1982 a new spa water bore-hole was sunk, providing a clean and safe supply of spa water for drinking in the Pump Room.
Bath was charged with responsibility for the hot springs in a Royal Charter of 1591 granted by Elizabeth I. This duty has now passed to Bath and North East Somerset Council, who monitor pressure, temperature and flow rates. The thermal waters contain sodium, calcium, chloride and sulphate ions in high concentrations.
Official source
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