The history of the Lords of the Manor of Aldermaston Court can be traced to Achard D'Aldermaston, who was born in 1036. Six families have had lordship of the Aldermaston estate. In the 11th century, Henry I gave Aldermaston to Robert Achard (or Hachard) of Sparsholt. In the mid-12th century, the Achard family founded the church of St Mary the Virgin. In 1292, Edward I granted the right for the lord of the manor to hold a market in the village. Another charter was granted by Henry IV, with evidence that the market existed until approximately 1900. The Achards also established an annual fair to observe the feast of St. Thomas the Martyr on 7 July.