How do I revive the knight?

Hint 1 of 10:

Do you have the missing parts?

Hint 2 of 10:

You need a hand, head, and heart.

Hint 3 of 10:

If you are missing any of these you are not ready for this puzzle.

Hint 4 of 10:

The hand is on the roof of the Church, you get there from Alexandria,
by looking through the Astrolabe.

Hint 5 of 10:

The head is given to you when you rise from the dead.  Again in 
Alexandria.

Hint 6 of 10:

The heart is in a skiff, just on the other side of the locked grate
in Alexandria.

Hint 7 of 10:

Okay, be certain to screw on the piece before you put on the next.