Ilchester Nunnery, in Ilchester, Somerset, England, was founded around 1217–1220 as the "White Hall Hospital of the Holy Trinity", after the gift of a house and other property by William "The Dane" of Sock Dennis manor, Ilchester. From this family was probably descended the influential Denys family of Devon, seated at Orleigh in the 16th century. By 1281, it had been converted into an Augustinian nunnery.