This document lists the major ruling powers in Britain from 500 B.C.E. to 2010 C.E., including the Celtic people from 500 B.C.E., followed by the Romans in 43 B.C.E., Saxons in 450 C.E., Vikings in 793 C.E., Normans in 1066 C.E., Tudors in 1485 C.E., Georgian period beginning in 1714 C.E., Victorian era starting in 1837 C.E., and the modern era from 2010 C.E. onward.