The document provides a timeline of rulers and historical periods in Britain from the Celts and Romans through the present day Windsor dynasty. It shows the rise and fall of the Romans in Britain from 43 AD to 410 AD, followed by the Anglo-Saxons and Vikings from 410 to 1066. Other major events and time periods shown include the Tudor dynasty from 1485 to 1603, the Great Fire of London in 1666, the Victorian era from 1837 to 1901, World War II from 1939 to 1945, and the current Windsor dynasty from 1901 to present day.