Question: Which grouping of the Conquest was the founder of Dieulacres Abbey described as being almost the last relic of?

Context articles: Grigori Kromanov
Temple of the Tooth
Dieulacres Abbey
Royal Palace of Kandy
Viimne reliikvia
Mahiyangana
Ranulf de Blondeville, 6th Earl of Chester
Chair of Saint Peter
Abbey of Saint Scholastica, Subiaco
Poulton Abbey

Grigori Kromanov (8 March 1926 in Tallinn – 18 July 1984 in Lahe, Lääne-Virumaa) was an Estonian theatre and film director.
 He directed some of the best known Estonian movies, including "Viimne reliikvia" ("The Last Relic") and "Dead Mountaineer's Hotel".
Sri Dalada Maligawa or the Temple of the Sacred Tooth Relic is a Buddhist temple in the city of Kandy, Sri Lanka.
 It is located in the royal palace complex of the former Kingdom of Kandy, which houses the relic of the tooth of the Buddha.
 Since ancient times, the relic has played an important role in local politics because it is believed that whoever holds the relic holds the governance of the country.
 Kandy was the last capital of the Sri Lankan kings and is a World Heritage Site mainly due to the temple.
Dieulacres Abbey was a Cistercian monastery established by Ranulf, Earl of Chester at Poulton in Cheshire.
 It moved to the present site at Abbey Green near Leek, Staffordshire in 1214, possibly in part as a result from raids at the former site by the Welsh.
The Royal Palace of Kandy ("Maligawa") in Kandy, was the royal residence of the Sinhalese monarchy of the Kingdom of Kandy in Sri Lanka.
 The last king to reside in it was King Sri Vikrama Rajasinha until he was overthrown by the British in 1815 with the aid of Kandian chieftains.
 Once part of a large palace complex that included the King's Palace ("Raja Wasala"), Royal Audience Hall ("Magul Maduwa"), Queen's Palace ("Meda Wasala"), King's Harem Quarters ("Palle Vahale") and Queen's Bathing Pavilion ("Ulpange"), together with the Temple of the Tooth ("Sri Dalada Maligawa") that held the Relic of the tooth of the Buddha.
 By ancient tradition the one who was in possession of the "Tooth Relic" had claim to the throne.
 Adjacent to the Royal Palace is the Victorian era building that until recently housed Kandy High Court.
Viimne reliikvia (Estonian for "The last Relic") is a 1969 Estonian film adaptation of "Vürst Gabriel ehk Pirita kloostri viimsed päevad" (Estonian for "Prince Gabriel or The Last Days of Pirita Monastery"), a historical novel by Eduard Bornhöhe.
 The film became extremely popular, and some critics consider it the only Estonian cult movie.
Mahiyanganaya is a town situated close to the Mahaweli River in Badulla District, Uva Province of Sri Lanka.
 It is said that Gautama Buddha visited Mahiyanganaya on the full moon Poya day of January in order to settle a dispute arose between Yakkas and Nagas (two tribes then inhabited this area) and this was his first ever visit to Sri Lanka.
 Then the Buddha preached Dhamma to Sumana Saman, a leader in this area, to whom the Buddha gave a handful of his hair relic so that people could worship.
 After that Sumana Saman (now the god Sumana Saman) built a golden chethiya in which the sacred hair relic was deposited.
 Later on about seven chethiyas were built over the original golden chethiya from time to time, the last one being built by the King Dutugemunu.
 As such, this historic town is a very sacred place for Buddhists.
Ranulf de Blondeville, 6th Earl of Chester and 1st Earl of Lincoln (1170–1232), known in some references as the 4th Earl of Chester (in the second lineage of the title after the original family line was broken after the 2nd Earl), was one of the "old school" of Anglo-Norman barons whose loyalty to the Angevin dynasty was consistent but contingent on the receipt of lucrative favours.
 He was described as "almost the last relic of the great feudal aristocracy of the Conquest".
The Chair of Saint Peter (Latin: "Cathedra Petri" ), also known as the Throne of Saint Peter, is a relic conserved in St. Peter's Basilica in Vatican City, the sovereign enclave of the Pope inside Rome, Italy.
 The relic is a wooden throne that tradition claims the Apostle Saint Peter, the leader of the Early Christians in Rome and first Pope, used as Bishop of Rome.
 The relic is enclosed in a sculpted gilt bronze casing designed by Gian Lorenzo Bernini and executed between 1647 and 1653.
 In 2012, Pope Benedict XVI described the chair as "a symbol of the special mission of Peter and his Successors to tend Christ’s flock, keeping it united in faith and in charity."
The Abbey of Saint Scholastica, also known as Subiaco Abbey (Italian: "Abbazia di Santa Scolastica"), is located just outside the town of Subiaco in the Province of Rome, Region of Lazio, Italy; and is still an active Benedictine order, territorial abbey, first founded in the 6th century AD by Saint Benedict of Nursia.
 It was in one of the Subiaco caves (or grotto) that Benedict made his first hermitage.
 The monastery today gives its name to the Subiaco Congregation, a grouping of monasteries worldwide that makes up part of the Order of Saint Benedict.
Poulton Abbey was a Cistercian medieval monastic house in Cheshire, England, which was founded between 1153 and 1158, and moved in 1214 to a site near Leek, Staffordshire, where it became Dieulacres Abbey.
 The original site became a grange estate of the abbey, and the chapel at the site was used as a one-room local church.
 In 1487 the abbey leased the estate to the prominent Manley family and the chapel was expanded to include a nave, chancel, and tower for use as its private chapel.
 By the 16th century all abbey buildings had been lost, though the site of the chapel was noted on a 17th-century estate map and later on the first Ordnance Survey map (1823).