Canterbury Cathedral is a Church of England cathedral located in the city of Canterbury, Kent. It is the seat of the Archbishop of Canterbury, who is symbolic head of the worldwide Anglican Communion. The cathedral was founded in 597 by Augustine of Canterbury, who had been sent to England as a missionary by Pope Gregory the Great. It was completely rebuilt between 1070 and 1077, and then largely rebuilt again in the Gothic style following a fire in 1174, with significant extensions to accommodate the flow of pilgrims visiting the shrine of Thomas Becket, the archbishop who was murdered in the cathedral in 1170. The Norman nave and transepts survived until the late 14th century, when they were demolished to make way for the present structures.