Rhaegar, despite wounding Robert, was struck down with a massive blow from Robert's warhammer, which scattered the rubies encrusted in Rhaegar's armor under the water. Rhaegar died with Lyanna Stark's name on his lips.
Oh, and since Ry put one for GoT I'm adding one for ASOIAF:
Who does the Ivory Dildo belong to in the books? (yep, you know it! the ONLY sex toy phallus mentioned in the whole of 5 books. For shame Martin, for shame! )