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London Bridge is the oldest bridge in the City of London. A Roman structure existed in the same area and there were several Saxon versions in wood. The first stone bridge took 33 years to construct under the direction of priest Peter de Colechurch, finished in 1209. Bridge House Estates was established by Royal Charter in 1282 with responsibility for the maintenance of this Bridge.
In 1758 the houses and shops that lined the bridge were demolished to make it easier to cross, but problems with congestion only increased. In 1800 a committee was established to consider improvements to the bridge, but when it was discovered that tidal scouring had severely weakened the bridge's abutments, the decision was made to reconstruct. A granite bridge with five arches designed by John Rennie and his son Sir John Rennie was chosen and completed by 1831. The wider arches had the unforeseen consequence of allowing the tide further access inland and causing a problem with sewerage.
The 1831 bridge was unable to accommodate the increased traffic of the 20th century and was reconstructed in the 1960s, opening in 1973. The 1831 bridge was dismantled and shipped to Arizona where it was reconstructed over Lake Havasu.