In May 1285, The Cross of Neith, an important religious relic acquired from Wales, was carried through London at the head of a royal procession for Edward I.
The Cross of Neith ( Y Groes Naid ) was a sacred relic believed to be... a fragment of the True Cross which had been kept at Aberconwy by the kings and princes of Gwynedd. They believed it afforded them and their people divine protection. It is not known when it first arrived in Gwynedd or how they had inherited it, but it is possible that it was brought back from Rome by Hywel Dda following his pilgrimage in about 928. According to tradition it was handed down from prince to prince until the time of Llywelyn ap Gruffydd (Llywelyn the Last) and his brother Dafydd.
Following the complete defeat of Gwynedd and the subjugation of the Principality, following the death of Llywelyn and the execution of Dafydd in 1283, this holy relic was ready for English expropriation alongside the other spiritual and temporal artefacts of the Principality. The Alms Roll of 1283 records that a cleric named Huw ab Ithel presented this "part of the most holy wood of the True Cross" to Edward I of England at Aberconwy. It then accompanied the king as he finished his campaign in North Wales before being brought to London and paraded through the streets at the head of a procession in May 1285 which included the king, the queen, his children, magnates of the realm and fourteen bishops.
What happened to the Cross of Neith after this is unknown. It has been speculated that it was destroyed, along with other relics, by Oliver Cromwell and fellow Puritans during the revolution of 1649 See More