Around 2000 years... at least that we KNOW of from the ancient Romans founding Londinium as a convenient place to bridge the Thames, and from archaeology. They may have put it there because there was already some kind of settlement, but at this distance of time there is no way of knowing. Any earlier settlement is likely not to have been built of stone, more likely wood, so there was little chance of any of it surviving. Fortunately the Romans DID use stone so we can be more definite about what they left behind because it's there to be dug up.

City of London - built by the Romans - now almost two thousand years old.

The Romans? Don't be ridiculous there was a London settlement a very long time before the Romans arrived.

Ar least as old as the Romans who built a city, Londinium,roughly where the City of London is today. Parts of the Roman wall can still be seen. However, evidence of even earlier settlements in tha area have been found, so a precise date cannot be given.

London colony (Londinium) established at the lowest bridging point they could find.

There was Celtic Iron Age settlement as well.

The Romans founded it about 45 AD - picking the spot as the first point where it was possible to put a bridge across the River Thames. There may have been a native village on the site before that, but that is impossible to detect.

2000 years

Settled by Romans

c. 43 AD (as Londinium)

The City of London was originally built by the Romans and is thought to be about 2,000 years old at present date.

There are some few surviving structures from the Roman period.

https://www.google.co.uk/#q=roman+london

https://www.google.co.uk/search?q=roman+...

UK still has many more miles of Roman Roads than modern motorways (free ways).

https://www.google.co.uk/search?q=roman+...

Londinium

i don t know but it is very old