Knights Templar in England
An inventory by Geoffrey Fitz Stephen reveals that by 1185, the Order of the Knights Templar had extensive holdings in London, Hertfordshire, Essex, Kent, Warwickshire, Worcestershire, Salop, Oxfordshire, Cornwall, Lincolnshire and Yorkshire. The involvement of Templars in financial matters is highlighted by Walter of Coventry's story of Gilbert de Ogrestan, the Knight Templar accused of embezzling taxes collected in the Saladin tithe of 1188. He was severely punished by his contemporary Master.
Knights Templar in popular culture
There are various legends concerning a treasure that some Templars managed to hide from King Philip and that was later lost. 
One particular story concerns Rennes-le-Château, where a treasure was supposedly found in the 19th century; one speculative source for that treasure was the long-lost treasure of the Templars.