People have lived in Poole for 2,000 years. There were lots of Celtic people there. Archaeologists found a boat in the harbor which they think was made in 295 BC. When the Romans invaded Britain in the 1st century, they landed in Poole. In the Norman Conquest in 1066, Poole was used mostly for fishing but then became a port for trading things like wool. In the 18th century, Poole was one of the biggest ports in England.