Portsmouth is a port city and unitary authority in Hampshire, England. Most of Portsmouth is located on Portsea Island, off the south coast of England in the Solent. This means Portsmouth is the only English city not located primarily on the mainland. Located 74 miles (119 km) south-west of London, 50 miles (80 km) west of Brighton and Hove, and 22 miles (35 km) south-east of Southampton; Portsmouth is part of the South Hampshire conurbation. It is the most densely populated city in the United Kingdom, with a population last recorded at 208,100.

Thomas Becket, also known as Saint Thomas of Canterbury, Thomas of London and later Thomas à Becket, served as Lord Chancellor from 1155 to 1162, and then notably as Archbishop of Canterbury from 1162 until his death in 1170. He engaged in conflict with Henry II, King of England, over the rights and privileges of the Church and was murdered by followers of the King in Canterbury Cathedral. Soon after his death, he was canonised by Pope Alexander III. He is venerated as a saint and martyr by the Catholic Church and the Anglican Communion.