Nerevars tomb

Why doesn't Nerevar seem to have a grave? I understand that only shreds of him remained after the Battle of the Red Mountain, but surely enough for an urn or simply a symbolic tomb. Apparently no such thing exists? It's an intriguing question why every clan in TES 3: Morrowind gets a family tomb but Nerevar does not. In TES Online, Veloth also gets his resting place but no trace of Nerevar's. I'm beginning to question whether Nerevar ever really existed.