Wallingford Priory, also known as Holy Trinity Priory, is believed to have stood on the site of the Bullcroft recreation ground off the High Street. This Benedictine priory was established on land granted to St Albans Abbey in 1097 by Henry I, and Geoffrey the Chamberlain gave the priory to St Albans Paul, 14th Abbot of St Albans, who sent some of his monks to establish a cell there. Wallingford Priory produced the mathematician Richard of Wallingford and the chronicler John of Wallingford.