What's going on

Hint 1 of 7:

The year is 1149.

Hint 2 of 7:

England is being split asunder by civil war.

Hint 3 of 7:

King Richard was murdered.

Hint 4 of 7:

The crown has vanished.

Hint 5 of 7:

The Normans are invading the kingdom from the south.