1. The first time the Romans invaded Britain in 55 BC.2. Londinium was the original name of the British capital at the time of the Roman Empire. By 100 AD., the population of Londinium was about 60,000 people. 3. The Romans left Britain in 410 AD. 4. William the Conqueror invaded Britain in 1066. He build the White Tower for it to be used as the Keep for himself and his representatives. It was the strongest and the most secure part of the castle and could keep the Royal Family protected in times of civil disorder or invasions. 5. The Great Fire of London began on September the 2nd, 1666 and it lasted for almost 5 days. One-third of London was destroyed by the fire. 6. The Great Fire started at the bakery of Thomas Farriner on Pudding Lane. It may have been caused by a spark from his oven which he failed to put out. The fire then quickly spread out because London was very dry after a long, hot summer and a very strong wind blew the fire from house to house in the narrow streets. 7