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 were designed for public bathing and 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.

History

Archaeological evidence indicates that the site of the baths may have been a centre of worship used by Celts; the springs were dedicated to the goddess Sulis, who was locally identified with Minerva. Geoffrey of Monmouth in his largely fictional Historia Regum Britanniae describes how the spring was discovered by the pre-Roman British king Bladud, who built the baths there. Early in the 18th century Geoffrey's obscure legend was given great prominence as a royal endorsement of the waters' qualities, with the embellishment that the spring had cured Bladud and his herd of pigs of leprosy through wallowing in the warm mud.

Roman Britain

The name Sulis continued to be used after the Roman invasion, leading to the town's Roman name of Aquae Sulis ("the waters of Sulis"). The temple was constructed in 60–70 AD and the bathing complex was gradually built up over the next 300 years. During the Roman occupation of Britain, and possibly on the instructions of Emperor Claudius, engineers drove oak piles into the mud to provide a stable foundation and surrounded the spring with an irregular stone chamber lined with lead. In the 2nd century it was enclosed within a wooden barrel-vaulted building, and included the caldarium (hot bath), tepidarium (lukewarm bath), and frigidarium (cold bath). After the Roman withdrawal from Britain in the first decade of the 5th century, these fell into disrepair and were eventually lost due to silting up and flooding.

The Bath curse tablets, a collection of 130 tablets, were discovered in the sacred spring in 1979/80. Many of the curses are related to thefts of clothes whilst the victim was bathing.

Post-Roman use

The baths have been modified on several occasions, including the 12th century, when John of Tours built a curative bath over the King's Spring reservoir, and the 16th century, when the city corporation built a new bath (Queen's Bath) to the south of the spring. Anne of Denmark came to Bath twice for her health. The court physician Théodore de Mayerne bathed Anne of Denmark in the King's Bath on 19 May 1613. She returned in August 1615. Anne of Denmark was surprised by a flame caused by natural gas in King's Bath, and thereafter used the New Bath or Queen's Bath where a column with a crown and the inscription "Anna Regnum Sacrum" was added in her honour.

The spring is now housed in 18th-century buildings, designed by architects John Wood, the Elder and John Wood, the Younger, father and son. Visitors drank the waters in the Grand Pump Room, a Neoclassical salon which remains in use, both for taking the waters and for social functions. Victorian expansion of the baths complex followed the Neoclassical tradition established by the Woods. In 1810, the hot springs were thought to have failed and William Smith opened up the Hot Bath Spring to the bottom, where he found that the spring had not failed but had flowed into a new channel. Smith restored the water to its original course.

The visitor entrance is via an 1897 concert hall by J. M. Brydon. It is an eastward continuation of the Grand Pump Room, with a glass-domed centre and single-storey radiused corner. The Grand Pump Room was begun in 1789 by Thomas Baldwin. He resigned in 1791 and John Palmer continued the scheme through to completion in 1799. The elevation on to Abbey Church Yard has a centre piece of four engaged Corinthian columns with entablatures and pediment. It has been designated by Historic England as a grade I listed building. The north colonnade was also designed by Thomas Baldwin. The south colonnade is similar but had an upper floor added in the late 19th century. The museum and Queen's Bath including the "Bridge" spanning York Street to the City Laundry were by Charles Edward Davis in 1889.