How do I get to Magister

Hint 1 of 5:

You must first open the King's Solar.

Hint 2 of 5:

This will allow you access to a barrier switch.

Hint 3 of 5:

Now you can pass the first barrier.

Hint 4 of 5:

The second barrier does not open, but you can now reach something.

Hint 5 of 5:

Turn the block to move the sliding door from the South Passage.