Triforce of Wisdom
From Multiversal Omnipedia
The Triforce of Wisdom was an ancient artifact resembling a small pyramid. Along with the other Triforces (Power and Courage), the Triforce of Wisdom maintains the balance of the world of Hyrule.
It possesses great magical power, but its primary benefit is its vast knowledge. The Triforce of Wisdom is sentient, and shares a rapport with the various Princess Zeldas. The evil Ganon long sought this Triforce since it, when combined with his own Triforce of Power, would make him unbeatable.
Legend of Zelda (Animated), Captain N
After Ganon's final defeat, the green Triforce of Power was placed with the other Triforces in Hyrule Castle.
