Dover Castle is a castle near Dover, England, it has been described as the "Key to England" for its historic defensive importance. On the highest point of the castle there are two buildings that were there before the fortress was built: the ruins of a Roman lighthouse and an originally Saxon church of St Mary in Castro. The enclosing earth wall was built in the 13th century. Century built over an older, the archaeologists in the middle of the 11. 1st century and which could therefore be the location of the original earth wall fortress built by William the Conqueror. After the Battle of Hastings in October 1066, William the Conqueror marched his forces towards Westminster Abbey to be crowned. He made a wide arc over Romney, Dover, Canterbury, Surrey and Berkshire. Dover has been a key memb