The people who built it.
No
London Bridge is not a live entity, nor has it ever been.
Construction on Tower Bridge in London began in 1886 and it was completed in 1894. Tower Bridge in Sacramento was finished in 1935.
the first bridge ever biult was your face
London Bridge is a very ordinary bridge which crosses the river Thames in London. The first bridge across the river was built by the Romans about 2000 years ago and there has been a bridge on the site ever since. At one time there were shops and houses on the bridge, which eventually collapsed - hence the children's song 'London Bridge is Falling Down'. Many foreigners mistakenly think that Tower Bridge - the next bridge downstream and much more interesting - is London Bridge.
London Bridge is the oldest, a bridge has been on or near the present site since Roman times. The actual bridge of course has been replaced a number of times the last in 1973. Others have included two Roman bridges, a Saxon Bridge, a Norman bridge, a medieval bridge and a 19th century bridge before the present one. The current London Bridge is often confused with Tower Bridge by tourists.
2012
London Bridge http://en.wikipedia.org/wiki/London_Bridge_%28Lake_Havasu_City%29
It has remained substantially unchanged since it was completed in 1894.
wooden bridges
so, la, so, fa, mi, fa, so, re, mi, fa, mi, fa, so (London bridge is falling down, falling down, falling down) so, la, so, fa, mi, fa, so, re, so, mi, do (London bridge is falling down, my fair lady)
Bridges have been built since the stone age, it is impossible to say where or when the first one was built.