This wall appears to have been built in the late 2nd or early 3rd century, certainly between 190 and 225, and probably between 200 and 220.London wall was the defensive wall first built by the Romans around the Londinium their strategically important port town on the River Thames in what is now the United Kingdom, and subsequently maintained until the 18th century. It is now the name of a road in the City of London running along part of the course of the wall. Until the later Middle Ages the wall defined the boundaries of the City of London. Although the exact reason for the wall's construction is unknown, it may have been connected to the invasion of northern Britain. No any proof have been received why this bridge was built. The images below are taken from the London museum and so on…

Purchase of London bridge

American gentleman representing McCulloch Properties, put in a bid of £1,025,000, and purchased it to take back to the USA. The bridge was divided into sections and marked out by numbers, like a puzzle. The sections were then dismantled and shipped of across the Atlantic. It arrived in California on July 5th 1968. After a 240 mile journey to its final destination, the first stone was laid by the then Lord Mayor of London, , Sir Gilbert Inglefield on September 23rd 1968.
It can still be seen there today in a place called Lake Hatsu City, halfway between Phoenix and Las Vegas. It was rumoured that the Americans thought they had bought Tower Bridge and it still holds its glory with it..

London bridge history

Firstly London bridge was just west of the old bridge in 1176, with the wooden bridge left standing until the work was finished. This was just as well really, as the stone replacement took over thirty years to complete! It must have been a major feat of engineering, when you think what was involved without the aid of modern day plant and machinery. The course of the river had to be diverted by the digging of massive trenches, from Radriffe to Patricksey (Battersea), in order to lay the foundations.

Even so, they still had to pile drive from floating barges. This may have had a bearing on the uneven measurements, it must have been impossible to maintain a position while fighting As the bridge was disassembled, each piece was numbered to aid reassembly and those markings can still be seen today. The bridge was reconstructed at Lake Havasu City, Arizona and re-dedicated on October 10, 1971. The reconstruction of Rennie’s London Bridge spans a man-made canal that leads from Lake Havasu to Thomson Bay, and forms the centerpiece of a theme park in English style, complete with mock-Tudor shopping mall. Rennie’s London Bridge has become Arizona’s second-biggest tourist attraction, after the Grand Canyon.the was bridge wos sold to usa at 1,025,000 pound in 1961.