Traces have been found of a Neolithic and Bronze Age settlement east of the village. Neolithic artefacts found include four flint arrowheads and a fragment of a polished stone axe southeast of the village. Bronze Age artefacts found include a middle Bronze Agepalstave and a late Bronze Agehoard at Thenford Hill Farm north of the village that included two swords, four spearheads, two rings and other bronze objects. Traces have been found also of an Iron Age settlement in the north of the parish on Arbury or Arberry hill. It was a fortified farmstead with a circular rampart in diameter. Fragments of Iron Age and Roman pottery have been found in the eastern part of the site. East of the village are the remains of an Iron Age settlement and Roman villa dating from 1st to the 4th centuries AD. The site was developed in four phases, with the villa itself being built about AD 300. It had six rooms, one of which had a fine Roman mosaic. Later extensions to the villa included a bath house. In the 1820s coins from the reigns of Tetricus to Constans were found in the walled garden of Thenford House. A few years later skeletons were found in the same garden. The villa site was excavated from 1971 to 1973. and is now a scheduled monument. The mosaic is preserved in Thenford House. Early in the 19th century a Roman funerary urn containing ashes was found in St Mary's parish churchyard. Nearby were found "a medal of Constans", plus tesserae suggesting that a building with a mosaic floor had been in the vicinity. Other Roman era sites have been found in the parish. Before 1830 a Saxon cemetery was found west of the village. Seven skeletons and a number of earthenware vessels were found in a barrow. The site has since been quarried, leaving no trace of the barrow. The only artefacts known to survive are one blackware vessel and an iron knife.
History
Thenford's name is derived from the Old English for "Ford of the Thegns". Thenford Manor House was near the parish church. Its origin was medieval, and in the 18th century was described as party Elizabethan. It was demolished probably when the current Thenford House was built. Thenford House is a Georgiancountry house built between 1761 and 1765 for Michael Wodhull. It is a Grade I listed building. It is currently the home of Lord Heseltine. In its grounds is a large arboretum that has become one of the most important private collections in the United Kingdom. It is open to the public four times a year. Thenford had a watermill west of the village and a windmill on a mound north of the village. The watermill was demolished in the 20th century but traces of its foundations, leat and mill pond survive. The windmill mound was about in diameter and still existed in 1947. It has since been destroyed. An open field system of farming prevailed in Thenford until the 18th century. Traces of ridge and furrow can be traced in much of the parish, and especially from the air. Parliament passed an Inclosure Act for the parish in 1766.
