The Skull of Llevule Andrano is an unique item in The Elder Scrolls III: Morrowind. It belonged to the journeyman enchanter Llevule Andrano.
It is a humanoid skull, bearing ritual markings. Directly beside the skull the unique Dagger of Judgement is placed on the same stool, suggesting that's what made the markings.
The Skull of Llevule Andrano can be found inside Andrano Ancestral Tomb on a stool in a ritual chamber. Beside it the unique Dagger of Judgement is placed.
In this part of the main plot the Nerevarine must bring Sharn gra-Muzgob the Skull of Llevule Andrano to get some information in turn.