Ra, the sun god!
How would I build that?
If you do build it, I will guide your boat.
Well, Maat Mons is the highest volcano on the planet Venus, which is not helpful, so I will divide it into parts. Maat was the Ancient Egyptian concept of truth, balance, order, law, morality, and justice. Maat was also personified as a goddess regulating the stars, seasons, and the actions of both mortals and the deities, who set the order of the universe from chaos at the moment of creation.
Since I can't submit a goddess, I think a LN cleric with the balance and law domains would be the closest personification of Maat. The Mons part means mountain, so I suppose I should be an earth elemental.
Let's say LN cleric 10 / elemental savant 10 with the balance and law domains and specialization in earth.