Marlbourgh had a 'Great Fire' some time in the 16th Century. From then on thatched roofs in the town were banned. The local style of thatch is quite steep. The whole area is a historians dream, Avebury, Spilbury hill Martinsell iron age fort, Savernake Crofton pump engines, the Calne Hill flight of locks, not to mention the GHQ line. the whole area is also a conservation area, the steep roofs are a hangover from the thatch period.