Warminster (ˈwɔrmɪnstər) is a historic market town and civil parish in south-west Wiltshire, England, on the western edge of Salisbury Plain. The parish had a population of 18,173 in 2021. The name Warminster occurs first in the early 10th century and the Minster Church of St Denys was begun in the 11th century. The High Street and Market Place have many fine buildings including the Athenaeum Centre, the Town Hall, St Lawrence Chapel, The Old Bell and a variety of independent shops. Several Army establishments, known collectively as the Warminster Garrison, are on the edges of the town. The origin of the root Wor is wara, the genitive plural of the Old English noun waru meaning "those that care for, watch, guard, protect, or defend." It was used as an endonym by both Goths and Jutes. Their specific ethnonym is unknown, though it likely was related to the native name of the oppidum at Battlesbury Camp during Sub-Roman times. The town's name has evolved over time; it was known as Worgemynstre in the early tenth century and was recorded as Guerminstre in the Domesday Book. The noun minster The derives from Old English mynster meaning monastery, nunnery, mother church or cathedral, and was given to the town by Saxon settlers in the seventh century. The main settlement at Warminster dates back to the Anglo-Saxon period, although there is evidence of pre-historic settlements in the area, especially at the nearby Iron Age hill forts: Battlesbury Camp, Scratchbury Camp and Cley Hill. Two Roman villas have been discovered in the area, as have caches of Roman coins. By the 10th century, Warminster included a royal manor and an Anglo-Saxon minster, with the residents largely associated with the estate. The royal manor was passed to new lords in the 12th century, during which time the township started to grow. In the 13th century a market was set up at Warminster, and by 1377 the town had 304 poll-tax payers, the tenth largest in Wiltshire. During the Civil War, between 1642 and 1645, the town was the site of a few incidents.