The Pool was of vital importance to London for centuries - as early as the 7th century Bede wrote that the Pool was the reason for London 's existence - .
Pool reached Pool 's peak in the 18th and 19th centuries .
The Pool was of vital importance to London for centuries - as early as the 7th century Bede wrote that the Pool was the reason for London 's existence - but it reached its peak in the 18th and 19th centuries .